Features: 1. No call charges. The 4GLTE gate opener rejects the call from authorized numbers and performs the ON/OFF action on the first ring. 2. Modern door operation method allows control via mobile network. 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 provide remote controls for different users. 5. Can be operated from anywhere without distance limitations; add or remove users via SMS. Specification: Rated Voltage: 12VDC 1 A Working temperature: -10°C to +60°C Storage temperature: -20°C to +60°C Relative humidity: 10–90%, no condensation 4GLTE frequency: 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 sensors to monitor doors and windows; when triggered, sends SMS alert and activates siren One relay output rated at 6A/240VAC for connecting to door switches or machines Relay action can send SMS confirmation to owner; user-configurable settings Operates on 4GLTE network for wide application compatibility Material: Metal Color: Blue Package Contents: 1 x GSM Gate Opener Note: Other items not included. Note: Light reflection and display differences may cause slight color variation between image and actual item. Measurement allowance is +/- 1-3 cm.