2-Channel Wireless Remote Control Relay Switch Transmitter Receiver 433Mhz Description: A great replacement for door open button or other switches of devices An automatic switch for automagtic regulation, safety protection and circuit conversion Sensitive for receiving signal , 433MHz radio frequency is available for choice Made of high- quality ABS material, safe without noise and spark , anti-corrosion, moisture-proof and anti-vibration Universal , can be widely used in aerospace, marine, automobile, household appliances, machine tools , and other automatic control area Specifications: Material: ABS Working Voltage: DC 15V-120V / AC 85V-250V Working Frequency: 433MHz Output Current: 105dBM Remote Control Type: Learning Code , Fixed Code Size of Switch : approx . 53 x 42 x 53mm / 2 x 1.65 x 2 Inch Size of Board: approx . 60 x 35 x 10mm / 2.26 x 1.37 x 0.4 Inch Size Chart: CLEARING: Long press the LOCK and UNLOCK buttons to clear old codes DUPLICATING: Place them side by side( as close as possible), then press both one key of your old remote and the to-be-matched key on this remote simultaneously. Package Includes: 1 Piece Wireless Circuit Board Relay 1 Piece Remote Control