Product Description Size: 7.0 cm * 3.0 cm * 3.0 cm Color: Green Material: Silicone Case Package Contents: 1 Oxygen Pump 1. Super Quiet: Our aquarium air pump adopts piezoelectric ceramic vibration technology to deliver air to the fish tank without making any noise. It's almost silent when you stand 1 meter away. Perfect for placement in bedrooms, living rooms and offices. 2. Low power consumption: The oxygen pump has a power consumption of only 1.0W and a flow rate of 400ml/min, suitable for 1-15 gallon fish tanks, aquariums and hydroponic systems. 3. Compact and convenient: Our USB oxygen pump is small, light and portable with durable buckle. You can easily take it outdoors for fishing. 4. Stable performance: USB plug, USB cable length is about 1.5m. The oxygen pump has stable performance, suitable for adding oxygen to small and medium fish tanks, and can be used continuously for 24 hours. 5. Satisfaction: The air pump can add enough oxygen to the fish tank and has a long service life. It will make your fish, betta or shrimp fall in love with it.