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, thus providing an uninterrupted supply of oxygen to your fish. Intelligent intermittent operation mode: The oxygen pump operates in intelligent intermittent mode, working for 10 seconds and stopping for 10 seconds. This ensures a continuous supply of oxygen while saving a significant amount of energy, thus extending the battery life. Quiet operation: With an operating noise level of 30 decibels or less, this oxygen pump operates quietly, a peaceful environment for you and your fish. and portable: The oxygen pump has an oxidation-resistant ABS shell. It also comes with a shock-absorbing silicone pad to reduce vibration friction. With a buckle on the back, it can be clipped onto aquariums, belts, clothes, etc., which makes it easy to carry. Automatic start in case of power failure: In the event