Overview: This GSM gate opener features remote on/off switching via authorized phone calls, allowing operation from anywhere without distance limitations, offering high convenience. Features: * Quad-band 850/900/1800/1900MHz support for global GSM network compatibility * No call charges – the GSM relay switch answers incoming calls from authorized numbers and executes ON/OFF actions upon the first ring * Secure operation using caller ID verification; unknown callers are automatically ignored * Add or remove authorized users via SMS text commands * Eliminates the need for physical remote controls or keys for multiple users * Supports up to 200 authorized phone numbers with configurable access times * Relay action can send an SMS confirmation to the owner or authorized number (user-configurable function) * Programmable relay on and off timing * Suitable for various applications including gates, bollards, barriers, garage doors, shutters, access doors, and machinery Specifications: Model: G202 GSM Frequency: 850/900/1800/1900MHz Digital Output: NC/NO dry contact, 3A/240VAC DC Power Supply: 9–24V DC/2A Power Consumption: 12V input, maximum 50mA, average 25mA SIM Card: Standard SIM card Antenna: 50 Ohm SMA antenna interface Temperature Range: -20°C to +60°C Humidity Range: Up to 90% relative humidity Item Size: Approx. 10.3 x 5 x 3.1cm / 4.1 x 2 x 1.2in Package Size: Approx. 11.5 x 6.3 x 4cm / 4.5 x 2.5 x 1.6in Package Weight: Approx. 97g / 3.4oz Package List: 1 x GSM Door Opener 1 x User Manual Card