Features GSM DOOR OPENER: 4G GSM remote switch, used as the gate, shutter, garage door opener, can be remotely control on and off by making a free call through the mobile phone, and open the door. MULTIPLE FUNCTION: Support 3G and 4G, supports the addition of 1001 authorized users, free access to remote control, APP control, 0‑9999s relay closure, supports relay continuity, and has no time limit. REMOTE CONTROL: This door opener supports remote restart, remote reset, unlimited distance, can be operated anytime, anywhere, with GSM 3G 4G comm frequency, can be used in global GSM networks. PLASTIC HOUSING: The door opener shell is made of excellent ABS plastic, with good insulation, impact resistance, long service life, support wall mounting, suitable for industrial control applications. WIDE APPLICATION: Suitable for elevators, garages, parking lots, resorts, control rooms, warehouses, group unmanned machine rooms, on site base stations, traffic controllers, ETC, electrical system, etc. Specification: Item Type: GSM Gate Opener Model: G203 Material: ABS Application: Access Control, Garage Rated Voltage: DC9V-36V 1A Working Temperature: -10℃~+60℃ Storage Temperature: -20℃~+60℃ Relative Humidity: 10-90%, no condensation Working Frequency: Global GSM 3G 4G Frequency Output Relay Voltage: 5A 250VAC, 7A 125VAC, 20A 14V Switch: Support Relay Ports: 5A 250VAC, 7A 125VAC, 20A 14V, 20A 5VFunctions: 1. Support for callny control APP to add 1001 authorized users 2. Supports one key query of all users 3. Call remote control, SMS control, APP control for free 4. Supports continuous trunk without time limit 5. Relay delay closing time supports 0-9999s 6. Multiple Applications: Gates, bollards, guardrail, garage doors, shutters, parking systems and access doors or machine 7. True authorization protection, unknown callers are ignored 8. Not limited by distance and can be operated anywhere 9. 1 way output, with relay, used to connect the door or machine switch 10. Based on GSM 3G 4G comm frequency, suitable for a variety of applications 11. 9-36VDC wide voltage input  Package List:1 x Door Opener3 x Wire Terminals1 x Antenna1 x User Manual Package List 1 x Door Opener 3 x Wire Terminals 1 x Antenna 1 x User Manual