This dc remote motor controller model of S1PF2-DC12 & CV-4 is used to control dc electric motor of rolling blinds doors, projection screens, awnings, pumps, winches, conveyors or other home and industrial electrical devices with voltage of DC12V 24V. Maximum working current is up to 30A. Theoretical remote distance is 500M. With Standard SMA external antenna interface, you can easily install the external antenna for longer distance. Both the remote and receiver have control button to remotely operate the motor.