["Description:\nbrand new and high quality.\n\nFeature:\nMobile phone calls can open the door remotely with zero call charges!\n200 users can be set to open the door within a limited for time period!\nSupport 200 groups of numbers, each group number can be set to control the relay within the specified for time period.\nOne way relay output, the authorized number is closed after calling in, and automatically disconnects after reaching the set for time.\nAfter the permission phone controls the relay, an action message can be sent to the user.\nBetween 0 and 999 seconds, the relay closing for time can be arbitrarily controlled, where 0 means: the relay is closed after 0.5 seconds, and 999 means: the relay is for always closed until the permission number is called.\nThe current status of the device (relay status and GSM signal value) can be queried via SMS command.\nYou can periodically upload the current status of the device to the first user by SMS.\nUse the clock on the module to send a text message to yourself each for time you turn it on.\nEasy and simple to install, remove and operate.\n\nSpecifications:\nItem Type: Gate Opener\nMaterial: Plastic+Metal\nSize: 13x7.4x2.7cm/5.1x2.9x1.06in\nColor: As shown\nGSM Frequency: 850/900/1800/1900MHz\nDigital output: One relay output, 3A/240VAC\nWorking power consumption: 12V input, maximum current 50mA\nSIM card: support 3V SIM card\nGSM antenna: 50Ω SMA antenna interface\nWorking temperature: -20-60°C/-4-140℉\nRelative humidity: 10-90%\nOptional Type: 2G\nQuantity: 1 Set\n\nApplications:\nRemote open/close swing/sliding gates, doors, shutters, garage doors,locks with a free call!\nResidential: Door,gate,garage access control, electronic fan,microwave,air-conditioner control.\nIndustry: Remote switch equipment, for example: street lights, solar power, motor, inverter, PLC, pumps, fans, etc.\nAgriculture: Remote control pumps, etc.\nBusiness: Remote control electronic boxes,bright billboards,LED signs,etc.\n\nSetting Methods:\n1.Insert a mobile phone card into the RTU5024 GSM controller.\n2.Connect the GSM antenna and turn on the power switch.\n3.Edit the SMS with your mobile phone and send it to the mobile phone card number in the RTU5024 GSM controller. After receiving, it will reply to the SMS confirmation.\n(Please refer to the manual for more settings operation.)\n\nNote:\nTransition: 1cm=10mm=0.39inch\nPlease allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid.\nDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!\n\nPackage Includes:\n1 x Gate Opener\n1 x GSM Antenna\n1 x User Manual\n1 x Power Adapter"]