Type: brushless push Size:9 inches Rated voltage: DC12V Rated current: ≤8A Speed range: 1000-3300 rpm Rated speed: ≥3300±100 rpm Motor power: 90W Noise: ≤69dB(A) Control system: PWM/ Temperature Temperature range: -40~±90℃ Could work with connecting the positive and negative charges 1st wire: red wire is "+",black wire is "-" 2nd wire: two white wires are temperature sensor 3rd wire: yellow wire is PWM, voltage-control wire