... 1.operating voltage: +12VDC 2.operating current: 3mA 3.Relay external load voltage : 0-220V/AC/DC ... the beginning of code-match press any button twice, LED lights twice, it means success, then retreatrepeat twice ... of the ID are eliminatedrepeat (1),1 ,2 ,3 ,4,if you want to return to the code ... , you can leave me a message. Universal 8-Channel lighting wireless RF remote control switch with plastic box