For those looking for a portable oxygen concentrator ideal for outdoor and home use, the NT-02 is your perfect choice. This model is our lightest 5-liter portable oxygen concentrator, ensuring comfortable and reliable oxygen therapy wherever you go. 【Important Usage Note】: This device operates on pulse dose technology. It releases oxygen only when it senses the user inhaling. Please wear the nasal cannula correctly to activate oxygen flow. VARON NT-02 Portable Oxygen Concentrator Description: 1. Portable Design for Outdoor Use: Easy to move, reliable, and simple. It's your trusted companion for outdoor adventures, on-the-go convenience, and indoor comfort. VARON continues its legacy of innovating reliable portable oxygen solutions with the NT-02. 2. Large Removable Battery: With its high-capacity 6400mAh/92Wh battery, this device offers multiple options to suit various lifestyles, power needs, and weight preferences. 3. Two Oxygen Delivery Modes: This device features two oxygen delivery modes: Pulse mode, which delivers oxygen by sensing the user's breathing rhythm, while Auto-Flow delivers oxygen at a constant frequency. The two modes automatically switch according to users' breathing patterns, suitable for a wide range of people. Compared to a single continuous oxygen mode, the dual oxygen mode saves power. This means the NT-02 runs longer without rapidly draining the battery. 4. Stable Oxygen Concentration: With a high oxygen concentration of 93%±3%, every breath you take is a breath of pure, concentrated oxygen, ensuring maximum effectiveness and enhancing your overall health and vitality. 5. Comfortable Oxygen Therapy: Designed with your comfort in mind, the NT-02 features a built-in auto-off timer. You have the flexibility to set an interval ranging from 1 minute to 240 minutes, making it easy to customize your oxygen therapy sessions according to your schedule. 6. Three Charging Options: AC Power Supply: The AC power supply is the primary way to charge the NT-02. The charger can be plugged into an indoor electrical outlet for charging, and it takes about 4 hours to charge, depending on the outlet. DC Power Supply: The DC power cord is a power cord you can use in your car to charge your devices on the go. This cord connects to the cigarette lighter in your car, boat, or RV. This charging method is suitable for those who travel by car for errands or wish to travel. Spare Battery: When traveling, keep spare batteries on hand to replace depleted batteries without needing to connect to a power source. Reason for selling: New, not used