WITH REMOTE SWITCH: GSM gate remote controller with remote switch for making free authorized calls can be operated from anywhere, with no distance restrictions. 3A 240VAC OUTPUT: GSM gate opener can be configured with up to 200 authorized phone numbers at a given time. One relay rated at 3A 240VAC output for connection to a door or machine switch. PROGRAMMABLE: GSM door opener adds or removes users via SMS commands. Relay or open time is programmable. 850/900/1800/1900 MHz quad band for use in global GSM networks. RELAY OPERATION: GSM gate access controller is easy to use. Relay operation will return SMS confirmation to or authorized phone, this feature can be passed with no call charges. RANGE OF APPLICATION: GSM gate door opener is suitable for group rooms such as doors, elevators, garages, parking lots, resorts, control rooms, warehouses, and unsupervised rooms.