Features: 1. No call charges. The 4GLTE gate opener rejects the call from an authorized number and performs the ON/OFF action on the first ring. 2. Convenient hands-free operation allows door activation without traditional methods. 3. Multiple applications including gates, bollards, barriers, garage doors, shutters, access doors, or machines. 4. Secure operation using caller ID identification; unknown callers are ignored. No need to provide remote controls for different users. 5. Operable from any location with no distance limitation. Add or remove users via SMS. Specifications: Rated Voltage: 12VDC 1A Working Temperature: -10°C to +60°C Storage Temperature: -20°C to +60°C Relative Humidity: 10–90%, non-condensing 4GLTE Frequency: B1, B3, B5, B8 Output Relay Contact Rating: 6A/240V AC Supports up to 999 authorized phone numbers Two digital inputs for door sensors, motion sensors, or other sensors to monitor doors and windows; triggers SMS alert and siren when activated One relay output (6A/240VAC) for connecting to door switches or machine controls Relay action can send SMS confirmation to the owner; this feature is user-configurable Designed for 4GLTE network compatibility for wide application use Material: Metal Color: Blue Package Contents: 1 x GSM Gate Opener (Other items not included) Note: Lighting and display settings may cause slight color variations between the product image and actual item. Measurement error allowed within +/- 1–3 cm.