Features The pump uses high-quality RS-360SH motor, and the maximum lifting height can reach 1.5 meters. Widely used for fish tank, fish tank, bonsai, rock garden, laptop water cooling system or many experiments. The input voltage is 3V to 12V DC, the terminal with a red dot is the positive electrode. The direction of rotation can be changed so that the input and output are interchangeable. A 5V 2A power supply such as a battery holder or USB computer is recommended for long-term work. Features: Rated voltage: 3 V ~ 12 VDC. Motor diameter: 27 mm/1.06 inches. Pump head diameter: 44mm/1.73inch Length: 60 mm/2.36 inches. Input/Output Diameter: 4mm/0.15in Maximum lifting height: 1.5m/4.9ft Note: 1, Please do not connect it to 7.5V or higher voltage for a long time. 2, Single dry cell battery, mobile phone charger and other chargers can NOT be used as power source. 3, All power supplies with real current less than 1.5A or actual voltage more than 12V can NOT be used otherwise the pump will not work or could burnout. 4, The pump is not a submersible pump, it cannot be put into water. 5, the empty test time should not be too long. 6, impurities in the water should not be sucked into the pump, so make sure the water is clean. 7, If the pump is blocked, open the front cover and clean. Package includes: 1 x Mini Pump Package List