8 channel rf remote transmitter & receiver, model of 0020037 (S8CA-DC091224 & CV-8), operates in 8 working modes. It can be used to control at most 8 on off electrical devices. With characteristics of strong anti-interference, reverse power protection and over current protection. Three voltages dc9v, dc12v and dc24v are provided to choose. Widely applied to control every kinds of lights, electrically operated doors gates windows blinds and so on.