Is Smart Device:No Material:Plastic Remote Distance:50m Features:wireless Model Number:2CH Switch Type:REMOTE CONTROL Warranty:1 Year Certification:CCC Item Type:SWITCHES Origin:Mainland China Please notice :( this is not for face to face copy or cloning or duplicating ) it is only a common RF remote control(transmitter ).so it is only the professional can buy it alone.or who buy our switch ,then need additional transmitter. If you a freshman about RF remote control system . please buy otherduplicating/cloning /copied remote control . we are So Powerless to solve this problem. About the people who do not understand then find it is cheap and buy it . when he get it and tell us it doesn't work with his rolling code or other receiver what what ... and give us the negtive feedback ... Dear friend..if you do not know ..please do not place the order... thank you Channel: 2CH Remote Control Distance:0-50m Encode: EV1527 Frequency:315 or 433 MHz Size: 55mm x 30mm x 13mm Power Supply: 1 X 12V/23A Battery (Not included)