Hot ! Thunbird New 12v 4 Channel Wireless Remote Control Receiver Momentary Switch Applies to: remote control electric doors, windows, switches, door control LED lamps, motors, circuit security and other industrial lighting remote areas or remote on-off control. Using large-capacity relay, can control appliances and equipment on the KW Wireless coding technology, no direction, switch without disturbing each other Service: a month to replace the new products and provide service parts for one year. Upgrade new high-speed diode, more stable and durable.