This is lightweight, small size, high efficiency, low consumption and low noise water pump. It has been used widely, in household include cooking, cleaning, bathing, space heating and water flowers, etc. Note: Please do not test long time with no-load, inside is with plastic leaves, can't suction impurity. Feature: self-priming pump Optimal For Voltage: 6V Specification： Working Voltage: 4v-12V Working Current: 0.8A Motor Diameter: 27mm Water Pump lenght: 52mm Drain Hole: 4mm Weight:70g For any technical support or suggestion, please kindly go to our forum.