... Quad band GSM-850, GSM-900, GSM-1800, GSM-1900 MHz - 2 outputs GSM remote control switch The GSM-RKEY remote Controller ... by programming authorized users telephone numbers into the GSM-RKEY, open the gates from anywhere in ... in the world Mainly Features of the GSM-RKEY:GSM-RKEY, it connects to the cell phone ... a text message. · Quad band GSM-850, GSM-900, GSM-1800, GSM-1900 MHz so will work anywhere in ...