Product description Size: 7.0 cm * 3.0 cm * 3.0 cm Color: dark blue, black, green Material: Silicone shell Package content: 1pcs oxygen pump 1. Super Slient : Our Aquarium Air Pump adopts piezoceramics vibration tech to transport air into fish tank without making noise. It is almost mute when you stand out of 1 meter. A perfect choice to be placed in the bedroom, living room and office. 2. Low Power Comsumption : Power consumption of this oxygen pump is only 1.0W, with flow rate 400 ml/min, suitable for 1-15 gallons fish tanks, aquarium and hydroponic system. 3. Compact & Convenient :Our usb oxygen pump is small, light weight 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 1.5m . Oxygen air pump is stable performance, is ideal for small and medium-sized fish tank plus oxygen, It can be used 24 hours continuously. 5. Satisfaction :Air pump can add enough oxygen in a fish tank with long service life.It will makes your fish, betta or shrimp love it.