G202 GSM Gate Opener Relay Switch Remote Control 200 User Door Access Wireless Door Opener Free Call 850/900/1800/1900MHz For Driveway ,Easy to Operate

Add or remove users via SMS text commands. Relay close or open time is programmable. Can be operated anywhere, no distance restrictions. Quad-band, can be used in the global GSM network. No need for remotes or buttons for different users.