① Oxygen Source and Replenishment Method: Oxygen concentrators require no pre-stored oxygen; they extract and purify it directly from the surrounding air, eliminating the need for additional oxygen. Oxygen tanks, on the other hand, rely on pre-filled oxygen storage with a fixed capacity. Once the tank is depleted, they must be regularly refilled at a designated station or replaced with a new tank for continued use.
② Power Supply and Operational Continuity: Oxygen concentrators require only a power source (plugged in or battery-powered) and can continuously produce oxygen as long as the power supply is working. Oxygen tanks are limited by the amount of oxygen stored in the tank. Once the oxygen is depleted, their operation ceases and they cannot automatically resume oxygen supply.
③ Cost-Effectiveness and Applicable Scenarios: While oxygen concentrators require an initial investment, they offer no long-term oxygen replenishment costs, making them more cost-effective and suitable for daily, long-term oxygen therapy (e.g., chronic patients receiving oxygen for a fixed daily duration). Oxygen tanks have lower initial costs, but require ongoing oxygen refills or tank replacements, resulting in higher long-term costs. They are more suitable for short-term, temporary oxygen use or emergency situations.

Our oxygen concentrator combines pulse, fixed frequency, and continuous flow. The differences between the two are as follows:
① From a core principle perspective, a continuous flow oxygen concentrator continuously delivers oxygen at a fixed flow rate regardless of the user’s breathing pattern. The oxygen supply process is independent of respiratory signals, maintaining a constant flow rate. Pulse flow oxygen concentrators, on the other hand, use sensors to monitor the user’s breathing rhythm in real time, delivering precise oxygen pulses only during the inhalation phase (stopping oxygen supply during exhalation). This achieves “on-demand oxygen delivery” and avoids oxygen waste.
② In terms of applicable populations, continuous flow is more suitable for those with weak or irregular breathing, such as elderly critically ill patients, those recovering from surgery with weak breathing, and scenarios requiring simultaneous oxygen delivery by two users (such as family oxygen therapy for multiple family members). This avoids the risk of oxygen interruption due to untimely respiratory signal detection. Pulse flow is suitable for those with regular breathing patterns, such as adults experiencing altitude sickness, young people receiving oxygen therapy for mild postoperative symptoms, and those receiving oxygen for daily health care. It is particularly suitable for portable outdoor use. ③ In terms of oxygen utilization and energy consumption, pulse flow delivers oxygen only when inhaling, resulting in an oxygen utilization rate of up to 99.99% and lower energy consumption. When paired with a battery of the same capacity, its battery life is 20%-30% longer than that of continuous flow (for example, with a 7680mAh battery, pulse flow P1 gear can last for 6 hours, while continuous flow can only last for 2 hours). Continuous flow, due to the continuous oxygen supply, has some oxygen waste and higher energy consumption, making it more suitable for long-term use scenarios with a stable power supply (such as plugging in at home) and where battery life requirements are lower.

Our 5L adjustable oxygen generator uses pressure swing adsorption (PSA) technology to generate oxygen. The specific process is as follows: First, the outside air is filtered through the equipment’s 12-layer composite filtration system (including air intake filter, pre-filter, HEPA filter, medical-grade filter cotton, negative ion filter, etc.) to remove dust, bacteria, odor and moisture, completing air pre-treatment. Next, the pre-treated air enters an all-copper oil-free inverter-driven compressor using a driver chip imported from the United States, where it is pressurized to form a high-pressure airflow. The high-pressure airflow then enters a component equipped with a high-quality molecular sieve. The molecular sieve’s selective adsorption properties for nitrogen separate the nitrogen from the air (the nitrogen is periodically discharged after adsorption), allowing only oxygen to pass through, thereby generating high-purity oxygen.

Oxygen flow is not the higher the better, it needs to match the condition, Long-term high-flow oxygen inhalation in patients with chronic obstructive pulmonary disease (COPD) may inhibit the respiratory center (the body relies on hypoxia to stimulate breathing), leading to carbon dioxide retention; Hypoxia needs to be dynamically adjusted according to blood oxygen saturation. Blindly increasing the flow rate is not only ineffective, but may also increase the burden on the body, so you must strictly follow the doctor’s advice.

Our oxygen concentrators produce an oxygen concentration of 93% ± 3%, with a flow rate range equivalent to 1-5L. The 93% ± 3% standard is based on clinical research. Oxygen concentrations below 82% have limited effectiveness for hypoxic patients, while long-term use of excessively high-purity oxygen (such as 100% pure oxygen) can lead to oxygen toxicity (damaging alveoli and affecting the respiratory center). This range meets the needs of hypoxia treatment while ensuring safety, and is therefore adopted by international medical standards (such as ISO).

“5L equivalent” refers to the actual oxygen intake volume of a portable pulse oxygen concentrator in pulse oxygen mode, comparable to the continuous oxygen delivery of 5L/min from a traditional desktop oxygen concentrator.
Desktop oxygen concentrators provide continuous oxygen delivery (continuously output oxygen), but oxygen is not effectively absorbed during the intervals between exhalation and respiration (utilization rate is only 20%-30%).
Pulse oxygen concentrators use inductive oxygen delivery (delivering oxygen only during inhalation), resulting in a higher oxygen utilization rate (theoretical utilization rate is close to 100%). Therefore, a smaller oxygen delivery volume can achieve an actual inhalation effect similar to that of a desktop 5L/min concentrator.

It shares the same core functions as the “large fixed oxygen machines” used in hospitals (both use PSA molecular sieve oxygen generators with a concentration of 90%+), but is more portable. However, it cannot completely replace hospital treatment.
Similarities: Both provide medical-grade oxygen, making them suitable for oxygen therapy.
Differences: Hospital machines typically support higher flow rates (e.g., 10L/min), can supply oxygen to multiple beds simultaneously, and can connect to a ventilator. This machine is a portable model for home/outdoor use, with a flow rate of 1-5L/min. It’s suitable for long-term home oxygen therapy or short-term emergency use. It doesn’t support connection to a ventilator (severe cases require hospital treatment).
Simply put: During stable periods of illness (such as stable COPD), this machine can be used for long-term oxygen therapy at home. However, if an acute exacerbation occurs (e.g., worsening shortness of breath or confusion), immediate hospitalization is essential; a home machine cannot be used as an emergency measure.

This device can stably maintain a medical-grade oxygen concentration of 93% ± 3%. This concentration remains consistent across all flow rates, 1-7, and in both pulsed and continuous operating modes. This is ensured by two key technologies: ① Pressure Swing Adsorption (PSA) technology, combined with high-quality American molecular sieves, efficiently separates nitrogen and oxygen from the air, ensuring consistent concentration. ② A 12-layer composite filtration system (including primary filtration, HEPA filtration, negative ion filtration, and medical-grade filter pads) removes 99.9% of bacteria, dust, and odor from the air, ensuring oxygen purity at the source. This concentration meets international medical oxygen therapy standards (90%-96%) and can meet long-term oxygen therapy needs.

No. In continuous flow mode, the device uses a dedicated three-way pipe to enable simultaneous oxygen delivery to two users. Its flow splitting design, based on optimized fluid dynamics, ensures that the oxygen concentration of both outputs remains at 93% ± 3%, with a flow rate error within ± 15% (meeting medical device accuracy standards). This design has been tested for pressure drop, ensuring that even with simultaneous use by two users, there is no loss of oxygen pressure or concentration due to flow splitting. This makes it suitable for multi-family oxygen therapy in homes (e.g., elderly couples) or for outdoor emergency response scenarios.

The device has a 7680mAh battery capacity. The battery life varies depending on the power level, approximately 2-6 hours. The device can be powered by an external power supply, a vehicle, or batteries.

The charging port for this oxygen concentrator is located on the machine itself, and the battery must be plugged in to charge. You can charge the battery while using the concentrator.

Our oxygen machine can run continuously for 24 hours, but we do not recommend this as it will shorten the life of the compressor and, therefore, the machine’s lifespan.

The device’s operating noise level is ≤60dB (A), equivalent to the sound intensity of a normal face-to-face conversation (40-60dB (A)), meeting noise control standards for medical equipment. This low noise level is due to the all-copper, oil-free inverter-driven compressor (with a driver chip imported from the United States), which optimizes speed stability and reduces mechanical friction noise. The cooling fan also features a silent air duct design, ensuring no noise disturbance to the user or nearby personnel during nighttime use in the bedroom or during daily oxygen therapy in the office.

Yes, the device requires a 3-minute preheating period before starting. This is standard for medical oxygen equipment. Its main functions are: ① Activating the molecular sieve adsorption performance to ensure that the target concentration is reached quickly after startup; ② Protecting core components such as the compressor from mechanical damage caused by cold starts. Precautions during the preheating period: ① Do not plug in or unplug the power supply or remove the battery during preheating; ② Do not connect a nasal cannula for oxygen inhalation (the concentration will not stabilize during this period); ③ If the preheating period times out (exceeds 5 minutes) or the “preheater failure” alarm is triggered, immediately disconnect the power supply and try again later. If the preheating period still fails, contact customer service. Do not force the device to start.

The core difference between the three modes lies in the oxygen delivery logic, and the selection should be based on the user’s breathing status:

Recommendation: If the user can breathe normally on their own, prioritize P1-P6 (adjust the level based on oxygen therapy needs; higher levels increase the single pulse oxygen flow rate). If the user’s respiratory function is weak, choose P7, which only delivers 1L of oxygen.

You will need to contact us to purchase a three-way hose. First, set the device to “P7 Continuous Mode” (only continuous mode supports dual users; pulse mode does not). Then, plug one end of the three-way hose into the oxygen outlet of the device and connect the other two nasal cannulas to each user.

Note: When using the device for two users, the oxygen concentration remains at 93% ± 3% and will not decrease due to the split flow. It is safe to use (suitable for simultaneous oxygen therapy for two elderly people at home or for outdoor team emergencies).

High Altitude Mode is designed based on an atmospheric pressure differential compensation algorithm. When the device detects an increase in altitude (a decrease in atmospheric pressure), it automatically adjusts the compressor output pressure and molecular sieve adsorption efficiency to ensure that the oxygen concentration remains at 93% ± 3% (to prevent inadequate oxygen separation due to low atmospheric pressure).
Activation Scenario: The device is rated for an altitude of 0-5000m (16,404 feet). At altitudes above 2000m, it is recommended to manually enable High Altitude Mode (or have the device automatically trigger it). At altitudes above 3000m (e.g., the Qinghai-Tibet Plateau or during high-altitude mountaineering), High Altitude Mode must be enabled to ensure effective oxygen therapy. This mode does not require manual parameter adjustment; once enabled, the device adapts to ambient pressure changes in real time.

Don’t panic. The beeping and light indicate an “alarm.” First, check the screen (the device has a high-definition screen, which will display the cause of the problem). Then, address the issue accordingly. Common issues include:
① High Temperature Alarm (screen displays “High Temperature”): Caused by an internal temperature > 45°C (e.g., a cooling fan failure or excessively high ambient temperature). Action: Immediately disconnect the power cord and move to a well-ventilated, cool location (ambient temperature ≤ 30°C). Allow the device to cool for 15 minutes before restarting. If the alarm persists, contact customer service.
② Compressor Failure Alarm: Caused by abnormal compressor speed or stall. Action: Immediately stop using the device and disconnect the power cord. Do not disassemble the device yourself. Contact us for repair (the compressor is a core component, and unauthorized repairs will void the warranty).
③ Low Battery Alarm (screen displays “Low Battery”): Caused by a battery charge less than 20%. Action: Immediately connect the device to an AC power source (100-240V) or a vehicle-mounted DC power adapter (12V). If no external power source is available outdoors, replace the backup battery (it is recommended to always have 1 spare). 1 original battery);
④ No breathing alarm: Caused by nasal cannula detachment or loss of user breathing signal (in pulse mode). Action: Check that the nasal cannula is securely connected (not bent or blocked) and confirm the user’s breathing status. If the user is unconscious, provide immediate first aid and stop the device.
⑤ Fan failure alarm: Caused by cooling fan stall or insufficient speed. Action: After powering off, check if the fan inlet is blocked (e.g., by dust accumulation). Clean and restart the fan. If this does not work, contact customer service.
⑥ Preheater failure alarm: Caused by the preheater not reaching operating temperature (<37°C). Action: Restart preheating after powering off for 3 minutes. If the alarm persists, replace the preheater assembly.

The device has a double leakage protection design (compliant with medical electrical safety standards). Don’t panic if a small amount of water spills. Follow these steps:

① Immediately unplug the power cord (first the device, then the outlet), and remove the battery.
② Wipe any water off the surface with a dry cloth; do not use a hair dryer to prevent moisture from entering the device.
③Allow the device to air dry in a well-ventilated area for two hours. Ensure the device is completely dry before installing the battery and plugging it in.

Note: Avoid spilling water on the screen or in the gaps between the buttons (keep cups and water bottles at least 30 cm away from the device during normal use). If a large amount of water is spilled and there is a burning smell after turning it on, contact customer service directly.

The battery has an “overcharge protection” feature, so charging overnight is fine, but prolonged use will shorten its lifespan. There are two key factors to consider when deciding whether to replace the battery:

① Charging protection: The charger that comes with the device has an “auto power off at full charge” feature. After charging to 100%, it switches to “trickle charge.” This won’t damage the battery, but it’s recommended to unplug it once it’s fully charged (“Battery Full” appears on the screen).
② Lifespan assessment: A new battery can last for 6 hours on the P1 pulse mode. If it only lasts for less than 3 hours (less than half the charge), or if the screen displays “Battery Error” while charging, the battery is about to die and you should contact us to replace it with a genuine battery.

The device comes standard with a 7680mAh rechargeable lithium battery (compliant with UN38.3 aviation lithium battery safety standards). Battery life varies depending on the mode and setting:
① Pulse flow mode (P1-P6): P1 (lowest setting) approximately 6 hours, P6 (highest pulse setting) approximately 2.5 hours;
② Continuous flow mode (P7): approximately 2 hours (due to the continuous oxygen output, power consumption is higher than pulse mode).
It supports simultaneous charging: Whether connected to an AC power source (100-240V) or a vehicle-mounted DC power source (12V), it can operate normally while charging, and the charging process does not affect oxygen concentration and flow stability.

Original spare batteries can be purchased separately (contact us by email).
Charging time: Using the original AC adapter, charging from empty to full takes approximately 3.5 hours; using a vehicle power adapter, charging takes approximately 4.5 hours (due to the slightly lower output current of the vehicle power adapter).
Battery life expectancy: Under normal use, the battery has a cycle life of approximately 300 cycles (one full charge and discharge counts as one cycle).
Battery life expectancy indicates that the battery has reached its end of life and needs to be replaced if: ① When fully charged, the battery life decreases by more than 50% compared to a new battery (for example, the P1 setting decreases from 6 hours to less than 3 hours); ② The “Battery Failure” alarm is triggered during charging (the screen displays “Battery Error”); ③ The battery casing bulges, leaks, or deforms (immediately stop using the device to avoid safety risks).

The device supports three external power supply methods to meet the needs of different scenarios: ① AC mains: 100-240V 50/60Hz (universal voltage, suitable for homes, hotels, etc.); ② In-vehicle DC power supply: 12V (powered by the standard car cigarette lighter connection cable, suitable for long-distance self-driving and outdoor car oxygen therapy); ③ Power bank power supply: supports power banks with an output voltage of 20V, 3.5A (to charge the battery when not in use)

Plugging it into the car’s power supply won’t damage the battery, but it should be unplugged after the engine is turned off. Specifically:
① While driving: After the car is started, the car cigarette lighter draws power from the engine, not the battery. Using it as a power source (12V/approximately 100W) is perfectly fine and will not affect the car’s power.
② After the engine is turned off: The car cigarette lighter continues to draw power after the engine is turned off. If you forget to unplug it, it will draw power from the car battery, potentially draining the battery to the point of “not starting” within 1-2 hours. Therefore, it’s crucial to unplug it after the engine is turned off.
Recommendation: When using the car lighter while driving, secure the cable securely and out of the way of the steering wheel to prevent it from being accidentally pulled out.

Filter cotton are a critical consumable for maintaining oxygen purity. The replacement frequency should be adjusted based on the usage environment:
① Daily home environment (clean, low-dust environment): Replace every 2-3 months;
② Outdoor/dusty environment (such as construction sites, high-altitude hiking): Replace every month;
The device comes standard with 5 filter cotton. You can contact us to purchase additional filter cotton separately.

Molecular sieve columns are core components for oxygen separation. Under normal use, they have a lifespan of 2-3 years and should generally be replaced annually.
Factors that can shorten their lifespan include: ① Ambient humidity > 60% (high humidity causes the molecular sieve to absorb moisture, reducing oxygen separation efficiency); ② Prolonged use in dusty/fumey environments (failure to replace the filter pad promptly allows impurities to enter the molecular sieve column); ③ Using the device without preheating (cold starting can damage the molecular sieve structure); ④ Prolonged inactivity (if the molecular sieve is not used for more than 6 months, it will become damp and clump).

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After each use, clean, rinse, and disinfect the cannulas. You can soak them in a 5% potassium permanganate solution for 5 minutes, then rinse with water or wipe with alcohol. It’s recommended that adults replace them every 1-2 months, and infants, the elderly, or those with sensitive respiratory tracts every 2-4 weeks. If the cannulas become damaged, hardened, have an odor, or contain secretions that cannot be cleaned, they should be replaced immediately to prevent compromising oxygen safety. Please contact us to purchase.

You can, but you need to choose the right cloth and control the moisture content:
① Cleaning cloth requirements: Use a lint-free, soft cloth (such as a glasses cloth or baby wipes). Avoid rough cloths (which can scratch the screen).
② Control moisture content: Wring the cloth until it’s dripping dry (allowing it to dry within a minute after wiping). Avoid cleaning the gaps between the screen and buttons. Use a cotton swab dampened with water to remove dust from the gaps.
③ Do not use alcohol or disinfectant (which can corrode the outer coating). Do not rinse directly with water (absolutely not, as it can burn the motherboard).

For long-term storage, follow medical device storage standards. Specific steps:

① Cleaning the device: Replace the air filter, wipe the main unit housing with a clean, soft cloth (do not use alcohol or corrosive cleaners), and clean the nasal cannula (if reused, disinfect it with medical alcohol and air dry).
② Battery handling: Charge the battery to 30%-60% (avoid storing it fully charged or empty), place it in a separate battery bag, and store it separately from the main unit.
③ Storage environment: The device must meet the following requirements: “Temperature 10-30°C, humidity 30%-50%, no direct sunlight, and no corrosive gases” (e.g., a dry cabinet in a study; avoid humid/hot areas like bathrooms and balconies).
④ Regular maintenance: If the device is not used for an extended period, charge the battery to approximately 30% every three months.

The product comes with a one-year warranty.warranty coverage:
① Parts covered free of charge: Main unit
② Parts not covered by warranty (consumables): Air filter, nasal cannula, batteries, power cord, and other consumables
③ Damage Handling: Damage caused by improper user operation (such as using non-original parts, disassembly, or dropping or impacting the device) is not covered by the warranty and will incur a replacement and repair fee.

After-sales repairs follow the principles of “quick response and transparent process.” The specific steps are:
① Contact us directly via email, describe the problem, and record a video.
② Our technical team will conduct an inspection.
③ Provide you with a solution.

Within 90 days of your order, if you are dissatisfied with the product or your needs have changed, you may submit a return request by email at any time, provided the product is undamaged and scratched, and the original packaging and all accessories (including the instruction manual, warranty card, standard filter, carrying bag, etc.) are complete and intact. If your request is approved, you will be responsible for shipping the product back to the designated warehouse unless the issue is quality-related. Once the warehouse inspects and confirms that the product meets the return criteria, we will issue a full refund within 3-5 business days. The refund will be credited to your original payment account, with no hidden fees.