4G GSM Remote Gate Control System

Physical size: 96.5 × 50 × 31.5 mm (3.8 × 1.97 × 1.24 in); weight not specified. Powered by 9–24 VDC supply (2 A max), consuming only 25 mA on average at 12 V — ideal for long-term battery or solar-backed applications. Relay output supports both normally open and normally closed configurations, rated 3 A / 250 VAC. Quad-band 4G GSM radio covers all UK and EU frequencies (850 / 900 / 1800 / 1900 MHz). Operating conditions: -20 °C to +60 °C, ≤90% RH. Enclosure: impact-resistant ABS with SMA antenna interface for signal optimisation. Activates gates or machines via simple voice call from any authorised mobile — no app download, no account setup, no internet dependency. Up to 200 numbers stored locally; caller ID validation happens in real time. Relay behaviour (e.g., 2-second pulse for gate swing, 5-second latch for barrier lift) is customisable by SMS. Optional SMS feedback confirms every action — useful for remote site monitoring or fault diagnosis. Widely applied to domestic driveway gates, commercial loading bay doors, car park entry barriers, rolling shutters and industrial access points. Replaces outdated 433 MHz remotes vulnerable to cloning, and avoids cloud-connected devices subject to server downtime or data privacy concerns under UK GDPR.