Feature:1. [Two Power Supply Modes]In the case of full power, continuous mode up to 15 hours of working time, indirect mode working time of 30 hours.2. [Large Air Volume]Stable silent oxygen pump with 3L/min or 6L/min air volume, provides a sufficient amount of water circulation in your aquarium.3. [Quiet]The aquarium air pump is made of ABS thickening plastics, a super silent air pump.4. [Portable Buckle]Come with a buckle, can be hooked on your bag, fishing box, aquarium when moving.5. [Widely Applicable]Suitable for a home aquarium, outdoor fishing, air pump back up, aquarium transportation, pond.Specification:Description:The oxygen pump with built-in a rechargeable lithium battery for storing energy, thus the oxygen pump works outdoor as well, it can be powered by a power bank, computer, car charger, etc. Suitable for a small-sized pond, outdoor fish tank, etc.Features:[Two Power Supply Modes]In the case of full power, continuous mode up to 15 hours of working time, indirect mode working time of 30 hours.[Large Air Volume]Stable silent oxygen pump with 3L/min or 6L/min air volume, provides a sufficient amount of water circulation in your aquarium.[Quiet]The aquarium air pump is made of ABS thickening plastics, a super silent air pump.[Portable Buckle]Come with a buckle, can be hooked on your bag, fishing box, aquarium when moving.[Widely Applicable]Suitable for a home aquarium, outdoor fishing, air pump back up, aquarium transportation, pond.Specifications:Types: Type 1; Type 2 (Optional)Material: ABS, Electronic Component Color: WhiteBattery3.7V, 1100mAh(Type 1), 3.74V, 2600mAh(Type 2) Power: 1W(Type 1), 2W(Type 2)Tank Size: 30L(Type 1), 30-100L(Type 2)Output: 3L/min(Type 1), 2*3L/min(Type 2)Inermittent work mode: max 30hContinuous work mode: max 15h Noise: 60dB Oxygen Hose Length: 1m/3.28ft(Type 1), 2m/6.56ft(Type 2) Package Size: 12*12*6cm / 4.72*4.72*2.36inchPackage Weight: 300g/0.66lb(Type 1);400g/0.88lb(Type 2)Type 1 Package List:1 * Oxygen Pump 1 * Connector (Red and black random delivery)1 * Air Stone 1 * 1m Aquarium Oxygen Pipe Type 2 Package List:1 * Oxygen Pump 1 * 2PCS Connector (Red and black random delivery)1 * 2PCS Air Stone 1 * 2m Aquarium Oxygen Pipe Note: The oxygen-increasing device cannot be placed in water, and the diversion hole cannot be blocked.Package List:1 * Oxygen Pump 1 * Connector (Red and black random delivery)1 * Air Stone 1 * 1m Aquarium Oxygen Pipe Type 2 Package List:1 * Oxygen Pump 1 * 2PCS Connector (Red and black random delivery)1 * 2PCS Air Stone 1 * 2m Aquarium Oxygen Pipe Note: The oxygen-increasing device cannot be placed in water, and the diversion hole cannot be blocked.