Features: 1. No call charges. The 4G LTE gate opener rejects the call from an authorized number and carries out the ON/OFF action on the first ring. 2. Modern door control method allows operation by simple phone call, eliminating traditional remote controls. 3. Multiple applications including gates, bollards, barriers, garage doors, shutters, access doors, or machines. 4. Secure operation using caller ID for identification; unknown callers are ignored. No need to distribute remote controls to different users. 5. Can be operated from anywhere with no distance limitation. Add or remove authorized users via SMS. Specifications: - Rated Voltage: 12V DC, 1 A - Working Temperature: -10°C to +60°C - Storage Temperature: -20°C to +60°C - Relative Humidity: 10–90%, non-condensing - 4G LTE Frequency Bands: B1, B3, B5, B8 - Output Relay Voltage Rating: 6A/240V AC - Supports up to 999 authorized phone numbers - Two digital inputs for door sensors, motion sensors, or other security sensors; when triggered, sends SMS alert and activates siren - One relay output (6A/240V AC) for connecting to door switches or machines - Relay action can send SMS confirmation to the owner; this feature is user-configurable - Operates on 4G LTE network for wide compatibility and remote access - Material: Metal - Color: Blue Package Contents: 1 x GSM Gate Opener Note: Light reflection and display settings may cause slight color variations between the product image and actual item. Measurement tolerance: ±1–3 cm.