Door Opener Relay Switch Wireless Remote Control Access Control Switch Door Opener Can Be Called And Portable ,Long Lasting

A powerful GSM relay for authorizing access control, controlling gates, remote device switching and parking systems Used where you are required to remotely turn on/off a system, machine or device via a free call from your mobile phone The relay action will return a text message confirmation to the owner or authorized calling number, this feature can be edited by the user. Add or delete users via SMS command, relay close or open time is programmable It can be operated anywhere without distance limitation.