Product Description Size: 7.0 cm * 3.0 cm * 3.0 cm Color: dark blue, black, grass green Material: Silicone shell Package content: 1 piece oxygen pump 1. Super Silent: Our aquarium air pump uses piezoceramic vibration technology to transport air to the aquarium without making noise. It is almost silent when you are outside 1 meter. A perfect choice to place in the bedroom, living room and office. 2. Low power consumption: The power consumption of this oxygen pump is only 1.0 W, with a flow rate of 400 ml/min, suitable for 1-15 gallon aquariums, fish tanks and hydroponic systems. 3. Compact and convenient: Our USB oxygen pump is small, light and portable with a durable buckle. You can easily take it outdoors for fishing. 4. Stable performance: USB plug, the length of the USB cable is approx. 1.5 m. The oxygen pump has stable performance, is ideal for small and medium-sized aquariums plus oxygen, it can be used 24 hours straight. 5. Satisfaction: The air pump can add enough oxygen to an aquarium with a long lifespan. It will make your fish, betta or shrimp happy.