Feature: 1. REMOTE CONTROL: Smart garage door controller with remote switch, easy APP control operating, for making free authorized calls, can be operated from anywhere, no distance limitation, can be used for global network. 2. SIM CARD SUPPORT: No call charges, relay switch receives calls from authorized numbers and then performs the switch operating on the first . Supports standard SIM cards only. 3. AUTOMATIC IDENTIFICATION: Use caller ID to identify and ignore unknown callers. Add or remove users using SMS text commands. No need to provide remote controls or buttons for different users. 4. PROGRAMMABLE: Add or remove users with SMS text commands. Relay or open time is programmable. Relay operating returns SMS confirmation to or authorized phone, this feature can be passed with no call charges. 5. APPLICABLE: For group type doors, elevators, garages, parking lots, resorts, control rooms, warehouses, unsupervised machine rooms and other telecom operators, on site lighting subframes, on site base stations, traffic controllers and distribution electrical systems and on site cabinets. Specification: Item Type: Gate Opener Model: RTU5024 4G Material: Metal Card Slot: Standard SIM Card Network: 4G Frequency: FDD: B1, B3, B5, B7, B8, B20 (2100/1800/850/2600/900/800) TDD: B38, B39, B40, B41 (2600/1900/2300/2500/2500) DC Power Supply: 9?24V Antenna: 50 Package List: 1 x Gate Opener 1 x Antenna 2 x Wiring Terminal 1 x Instruction Manual Note: Please note that the product is only supported in Europe, Africa and Asia. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.