12V DC 433 MHz 1 Channel RF Transmitter and Receiver Remote Control Relay. RF Relay Smart Wireless Remote Control Light Switch Garage Door Remote Opener 433Mhz Transmitter with Relay Receiver Great design - 433Mhz RF wireless remote control switch.Stable and reliable performance with high reception sensitivity (> 97dBm). Radio frequency signal transmission.Strong signal can pass walls, floors, doors,board and so on.It can be controlled within 50 meters distance in open area. You can remotely operate every machine connect with the relay receiver through the remote control. Easy to use - Extremely easy to set up and reset. There are 4 operating mode(momentary/toggle/latched/delay mode) can be chosen.You can easily set up by yourself depends on your needs. The operating mode of the product is adjustable.This item has already been set up in latched mode. More Flexibility - This receiver adopts 10A relay, which can load high-power electrical appliances to ensure long-term stability control.There are 3 terminals(normally open, common, normally closed) for the wireless relay. Quality Assurance - High-quality relay that can be used over 100,000 times.Let this product is more long-lasting and stable to use. The high-power terminal can withstand a current of 15A, so that this product can have a good effect even when the current is unstable. High Quality Remote Control - The remote control has a long service life. There is a screw port on the back of the transmitter, and the battery can be replaced after disassembly. The battery is CR2016.It is so easy to purchase.