Home Alarm Systems features: KKmoon® GSM Door Gate Opener Remote Relay Switch Free Call SMS Command Support 850/900/1800/1900MHz Color: we send based on the color or size of the main image of the product page. Quantity：we send based on quantity on title, if there is no quantity in the title, we send based on description. Overview: This GSM gate opener features remote on/off switch by authorized phone free calls, which can be operated from anywhere, no distance limit, very convenient. Features: *850/900/1800/1900MHz quad bands, can work in the worldwide GSM networks. *No call charges. The GSM Relay Switch answers the call from authorized number then carries out the turn ON/OFF action on the first 'ring'. *Secure - Using caller-ID for identification, unknown callers are ignored. *Add or remove users by SMS Text command. *No need to provide a remote control or keys for different users. *Up to 200 authorized phone numbers can be configured at the specified time. *The relay action will return a SMS confirmation to the owner or authorized call in number, this function is editable by user. *The relay close or open time is programmable. *Multiple applications. (Gates, bollards, barriers, garage doors, shutters and access doors or machines). Specifications: Model: 5034 GSM Frequency: 850/900/1800/1900MHz Supports: 2G GSM Card Digital Output: NC/NO dry contact, 3A/240VAC DC Power Supply: 9-24V DC/2A Power Consumption: 12V input Max. 50mA/Average 25mA SIM Card: Standard SIM Card Antenna: 50Ω SMA Antenna interface Temperature Range: -20~+60°C Humidity Range: Relative humidity 90% Dimensions: Approx. 3.86 * 3.54 * 1.02in / 98 * 90 * 26mm Package Information: Package Size: Approx. 5.12 * 3.74 * 1.18in / 130 * 95 * 30mm Package Weight: Approx. 4.87oz / 138g Package List: 1 * GSM Door Opener 1 * User Manual 1 * Autenna