Features: 1. No Call Charges: The 4G LTE gate opener rejects calls from unauthorized numbers and then performs the ON/OFF action upon the first 'ring'. 2. Innovative Door Opening: Move beyond traditional door opening methods; enjoy the novelty of opening your door with a simple shake. 3. Multiple Applications: Suitable for gates, bollards, barriers, garage doors, shutters, and access doors or machines. 4. Secure Access: Utilizes caller ID for identification, ignoring unknown callers. No need to provide remote controls for multiple users. 5. Universal Use: Can be used anywhere without distance limitations. Add or remove users via SMS text. Specification: Rated Voltage: 12VDC 1A Operating Temperature: -10~+60℃ Storage Temperature: -20~+60℃ Relative Humidity: 10-90%, No Condensation 4G LTE Frequency: B1 B3 B5 B8 Related Output Relay Voltage: 6A/240V AC Supports up to 999 authorized phone numbers. Two digital inputs for door sensors, motion sensors, or other sensors to protect your doors and windows. When triggered, an SMS alert message is sent, and the siren activates immediately. One output with a relay rating of 6A/240VAC for connecting the door or machine power switch. The relay action sends an SMS confirmation back to the owner, a feature that can be edited by the user. Based on the 4G LTE network, applicable to numerous applications. Material: Metal Color: Blue Package Contents: 1 x GSM Gate Opener Only the above package content is included. Note: Light reflections and different displays may cause the color of the item in the picture to be slightly different from the real one. The allowed measurement error is +/- 1-3 cm.