RF DC 6V Wireless Learning Remote Control Switch 433Mhz Transmitter Receiver 1CH l Relay Remote control of the on and off of pump, machine,tool, socket, LED lights, doors, alarm system Easy to install and use. The wireless signal can pass through walls, floors and doors Material: durable PCB board and plastic Input Voltage: DC 6V, 1 Channel Board Dimension: 22x15x9mm; Case Dimension: 25x18x12mm