V2019 RTU5024 Rain Proof Type GSM Swing Sliding Gate Opener Relay Switch Remote Access Control Door Opener ,Easy to Operate

Feature 1 : Rechargeable battery for power failure alert Feature 2 : Alarm input port (when shorted will send the alert SMS) Feature 3 : Maximum 1000 authorized numbers Feature 4 : AC100-240V power input directly , no need extra power adapter For 2G , 3G and 4G version, that only difference is the module on board,and all the functions are the same, so the following description, we just use the 2G version circuitYou may also like Door Opener Relay Switch Wireless Remote Control Access Control Switch Door Opener Can Be Called And Portable ,Long Lasting.