Feature: 1. Remote Control: This GSM door opener with a remote on off switch for authorized calls for no charge calls, which can be operated from anywhere without distance restrictions, can be used in the global network. 2. 200 Authorized Phone Numbers: Up to 200 authorized phone numbers can be set at the specified time. 1 relay output rated at 3A 240VAC for connecting door or machine switches. 3. Security: Use the caller ID to identify and ignore unknown callers. Add or remove users with the SMS Text command. There is no need to provide remote controls or buttons for different users. 4. SMS Commands: Add or delete users via SMS commands. Relay or open time is programmable. Relay operate will send a confirmation SMS to authorized phone or can be done without call charges. 5. Applicable: Suitable for doors, elevators, garages, car parks, resorts, control rooms, warehouses, unsupervised machine rooms of the group type, such as telecom operators, on site lighting subframes, base stations on site, traffic controllers and distribution of electrical system and field cabinet. Specification: Item Type: 4G Gate Opener Material: ABS, PCB Model: G202 Card Slot: Nano SIM Network: 2G 3G 4G Frequencies: GSM: B3 B5 B8 (1800 850 900) CDMA: BCO (800MHZ) WCDMA: B1 B5 B8 (2100 850 900) FDD: B1 B3 B5 B7 B8 B20 (2100/1800/850/2600/900/800) TDD: B38 B39 B40 B41 (2600 1900 2300 2500) DC Power Supply: 9-36V Antennae: 50Ω . Package List: 1 x 4G Gate Opener 1 x Antennae 3 x Terminal Connector 1 x User Manual