Product description Size: 7.0 cm * 3.0 cm * 3.0 cm Color: dark blue, black, grass 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. Manual measurement, the size has slight error Please confirm the size and color before placing an order