Overview: This GSM gate opener features remote on/off switching via authorized phone calls, operable from anywhere with no distance limitations, offering high convenience. Features: * 850/900/1800/1900MHz quad-band support for worldwide 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 for identification; unknown callers are automatically ignored * Add or remove authorized users via SMS text commands * Eliminates the need to distribute physical remote controls or keys * Supports up to 200 authorized phone numbers, configurable at specified times * Relay action can send an SMS confirmation to the owner or authorized number; this function is user-configurable * Programmable relay on and off timing * Suitable for multiple 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