Features: 1. No call charges. The 4G LTE gate opener detects an incoming call from an authorized number and performs the ON/OFF action upon the first ring. 2. Modern door control solution with shake-to-open functionality for added convenience. 3. Multiple applications including gates, bollards, barriers, garage doors, shutters, access doors, and machines. 4. Secure operation using caller ID authentication; unknown callers are automatically ignored. No need to distribute remote controls to users. 5. Operable from any location without distance limitations. Add or remove authorized users remotely via SMS. Specifications: - Rated Voltage: 12V DC, 1 A - Working Temperature: -10C to +60C - Storage Temperature: -20C to +60C - Relative Humidity: 1090%, non-condensing - 4G LTE Frequency Bands: B1, B3, B5, B8 - Output Relay Contact Rating: 6A / 240V AC - Supports up to 999 programmable authorized phone numbers - Two digital inputs for connecting door sensors, motion sensors, or other security devices. Triggers instant SMS alerts and siren activation when activated. - One relay output (6A / 240V AC) for connecting to door switches or machine controls - Relay operation can send SMS confirmation to the owner; this feature is user-configurable - Built on 4G LTE network technology for reliable remote connectivity - Material: Metal - Color: Blue Package Contents: 1 x GSM Gate Opener Note: Other items shown in images are not included. Light reflection and differences in display screens may cause slight variations between the product color in pictures and actual color. Measurement error allowed within +/- 13 cm.