Check the listing for details. 1 Receiver + 2 Transmitter Control Switch DC 12V 24V 1 Channel RF Relay Latched. Color: Black, Condition: New. Listed at 21.10 USD. 1 Receiver + 2 Transmitter Control Switch DC 12V 24V 1 Channel RF Relay Latched Style: 1 Receiver + 2 TransmitterOperating Voltage12 VoltsConnector TypeWirelessInternational Protection RatingIP65Control MethodRemoteConnectivity ProtocolX-10Unit Count1.0 Count433 Mhz universal wireless remote control switch: input voltage DC 5.5~24V, working mode is superheterodyne.Transmission distance: about 50~100m (open space), if the transmission distance is not ideal, the antenna inside the receiver box can be pulled outside through the round hole of the box, which will be more conducive to reception.Support remote control type: EV1527 learning code. Supports up to 20 remote controllers (if the remote controller is lost, buy one to pair with the PCB board.)PCB size: 47 x 26 x 18 mm (L,W,H), output terminals: NO , NC , COM.It supports remote and wireless control of your car battery power, garage doors, electronic doors, appliances and other remote control devices.