This curtain remote control is a newer design. We use the encoder loop feedback system to drive the motor. That motor is a extra low voltage DC12v. Loading weight is 8 KG, You can teach the curtain to open or close position once the curtain will memory the position, even you unplug the power. If you want change you set position of the curtain, you are available to re-teach the unit. You can operate it by manual push button or remote control also.