product description Features: 1. No wear, small vibration and long life span of 50,000 times. 2. Single outlet, widely used for aquarium tank oxygen circulate, air pump machine products. 3. Self-priming function, easy installation, and stable performance. 4. Mini Air Pump for the aquarium tank Oxygen circulate. Appropriated for liquid circulation, transfer etc. Specification: Current: 12A Flow Rate: 30mA/3V Working Current: 150MA Operating Range Voltage: DC1.5-3V Total Size: 46 x 21 x 12mm/ 1.9 x 1.1 x 0.47(L W T) Package Included: 1 x Mini Air Pump Motors Hassle-Free : high quality and good service. Here with our 90-day money back risk-free purchase , order now! If you are not satisfied in any way, Refund or Replacement for any quality problem.