Features:
-It adopts double-hole air outlet, suitable for 30-100L aquarium. 
-Air volume can be adjusted using button without control valve.
-The bottom has rubber pads to reduce noise and prevent the pump from moving excessively during operation.
-There are two working modes, normal mode and intermittent mode. In normal mode, the battery can work continuously for 25 hours. In intermittent mode, the device works for 10 seconds and rests for 10 seconds, and can work continuously for 50 hours.
-Easy to use, just plug in and go. If the power is interrupted, the lithium battery automatically switches from electric mode to battery mode.

Specifications:
Material: plastic
Size: 12*3*8cm
Color: white
Maximum air flow: 3L/min
Mode: two
Battery capacity: 2000mAh
Voltage: 3.7V
Power: 2W
Applicable to: 30-100L aquarium