Programmable GSM Gate Remote Controller

Dimensions: 96.5 × 50 × 31.5 mm (3.8 × 1.97 × 1.24 in). Power input: 9–24 VDC, 2 A; low-power design draws only 25 mA on average (max 50 mA at 12 V). Relay rating: 3 A / 250 VAC, configurable as normally closed or normally open dry contact. Supports full 4G GSM operation on quad-band frequencies (850 / 900 / 1800 / 1900 MHz). Operating environment: -20 °C to +60 °C ambient temperature, up to 90% relative humidity. Housing material: durable ABS plastic. Integrated 50 Ω SMA antenna port for optional high-gain external antenna installation. Enables secure, location-independent gate or device control using any standard mobile phone — no app, no internet, no local hub required. Authorises up to 200 unique phone numbers; rejects all calls from unlisted numbers using built-in caller ID verification. Relay activation timing and behaviour (pulse/latching) are fully programmable via SMS. Each successful operation sends an SMS confirmation — configurable per user or globally disabled. Deployed for automated access to residential gates, commercial garages, parking bollards, roller shutters, warehouse doors and industrial equipment. Eliminates need for multiple physical remotes, key fobs or wall-mounted push buttons — one central unit manages all user permissions remotely via SMS or voice call.