This is a 4 keys 433 MHz Fixed Code RF remote controller, can be used with the switch support 433mhz RF, the main switch need to have function to learn signal, to learn the code of this remote, this remote itself not able to copy/learn signal from other devices.The signal is strong, can reach far distance.★★★This is NOT for duplicate autogate remote control, it is fixed code remote. DO NOT BUY if not sure what it is.Specs: Battery: DC12V（23A/12V） Frequency: 433 MHz Chip: HS1527 95mm×40mm×15mm Signal reach 100m for open space, normal condition 20-30m#433 #mhz #remote #control #controller