This vacuum pump has long lifetime low noise and high pressure. This pump operates at 12V and has enough suction for most small projects. 1.Rated Voltage : 12Vdc 2.Drive by: Motor 3.Life: 1000 hours 4.Type: Diaphragm 5.Function: Duty circle when pumping air 6.Continously working hour: 5 hours NOTE: You may see sparks coming from the motor brush inside the housing, it's normal. It causes by friction, sparks will be less after a few times of working