Anntem RF Wireless Remote Control Switch 433mhz Transmitter and Receiver kit DC 5v 3.7v 9v 12v Universal Battery Power Mini Small Switch Energy Saving Relay Module Circuit Micro Control Transfer Line

Relay pins "NO" "NC" "COM" are a set of transfer switches, no power output, not positive, not negative, control circuit isolation, is an independent switch. When the relay is working, NO and COM are connected. NC and COM are disconnected. When the relay is released, NO and COM are disconnected. NC and COM are connected.  The standby mode is default module, NO and COM is disconnected."COM" and "NC" are short circuits  Press the remote control “A” button for one second, NO and COM connection (module LED flashes once) Press the remote control “B” button for one second, and the NO and COM are disconnected (the module LED flashes twice) There is no memory function of the module. If the power is turned off or the remote control is used to turn off, NO and COM are disconnected. This product uses a power saving program. It is very suitable for battery power. Sight distance, control range over 20 meters, (signal can be controlled through the wall) 1000mA capacity battery, standby can be more than 6 months. Turning into hibernation when standby can be very energy. efficient.Because of this dormant program, Button time must be greater than 0.8 seconds.If you push the button too fast, you may occasionally lose control.