Small size, low heat generation, multiple protections; high efficiency, multiple speed regulation, large torque. Motor: within the rated speed, if there is no overload, the torque is basically unchanged. The motor can be adjusted forward and reverse for a long time without being affected. Small size, does not take up space. Voltage: AC 110V/220VThe motor is powered by a AC 110/220V power supply and is transformed and rectified to DC 310V working through a controller. It is a permanent magnet DC brushless motor. Motor length L (mm):105. Center hole distance: 65. Mounting hole: 6mm through hole. 1x 450W High voltage 80 brushless motor + 1x reducer + 1x controller. If you want other speed and gearbox ratio, pls kindly free contact to us. Please check with y. We are not responsible. OR, you may choose to have a replacement. Our aim is to provide Top Level Customer Service, normally so we will try our best to solve any problem you have. Please DON’T leave negative or neutral feed.