High-Capacity Lithium Battery: This fish oxygen pump is equipped with a high-capacity lithium battery, ensuring long-lasting performance. It can be charged via USB and can be used while charging, providing an uninterrupted oxygen supply to your fish. Intelligent Intermittent Working Mode: The oxygen pump operates in an intermittent mode, working for 10 seconds and stopping for 10 seconds. This ensures oxygen delivery while conserving power to extend battery life. Quiet Operation: With a working noise level of ≤30 decibels, this oxygen pump operates quietly, supporting a calm environment for both users and fish. Durable and Portable Design: The oxygen pump features an ABS shell resistant to oxidation. It includes a silicone shock-absorbing pad to reduce vibration. A buckle on the back allows secure attachment to fish tanks, belts, or clothing for easy portability. Automatic Operation During Power Outage: In the event of a power outage, the oxygen pump automatically activates to maintain oxygen supply to your fish. Suitable for indoor and outdoor use. Battery capacity: 4800 mAh Type: Double Vent Hole Color: White Material: Plastic Package Contents: 1 × Air Pump Note: Color may vary slightly due to screen settings and lighting. Measurement tolerance: ±1–3 cm.