1、GSM access controller G202 is a very simple device that can be used to authorize access control, remote device switching, parking system, etc. 2、There is no calling fee, the GSM access controller refuses to call the authorization number and then performs an open/close operation. 3、Opening the door is no longer traditional, and shaking the door to open the door adds more convenience and provides more convenience for your life. 4、Based on GSM 2G or 3G (depending on your option) network, widely used, can be used for doors, door posts, guardrails, garage doors, shutters and access doors or machines. 5、Security caller ID for identification, will ignore unknown callers, add or delete users through SMS text commands, no need to provide remote control for different users. 6、Can be operated from anywhere, no distance limit, up to 200 authorized phone numbers can be configured. 7、With relay level 3A/240VAC output for connecting door or machine switch Relay operation will return SMS confirmation to the owner, this function is edited by the user. Condition: Brand New Item Type: Gate Controller Material: ABS Color: As the Picture Shown Constant Voltage: DC12V 1A Working Temperature: -10℃-60℃ Storage Temperature: -20℃-60℃ Relative Humidity: 10-90%, No Condensation Optional Working Frequency: GSM 2G: 850/900/1800/1900MHz 3G: 800/850/900/1900/2100MHz UMTS Antenna: 50Ω SMA Support Wired Switch Relay Parameters: 3A/240 VAC, 20A/14VDC Volume: Approx. 96.5 x 50 x 31.5mm/ 38 x 19.7 x 12.4in 1 x GSM 2G Remote Access Control Door Opener 1 x Antenna 1 x Manual