Features: This air pump is specially designed for emergency,which is power cut,and fish for tank can not provide oxygen with fish. This air pump will offer air for fish to live powered by batteries. Including air tube,hanger and bubble stone. Portable,convenient to use,quick to effect and great to use. Durable,high quality and suitable for below 0.6m fish for tank. Specifications: Material: Plastic Model: RS-960 Type: Aquarium Device Color: As pictures shown Power: 2.5W Power Supply: 2 x D size Battery(Not Included) Frequency: 50/60Hz Voltage: 3.0V Air Output: 2L/min Pressure: 2Mpa Size: One Size 13x7x4cm(5.12x2.76x1.57in) Package Includes: 1 x Air Pump note: 1.Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!