Features: 1.With six independent relay switches, and by dialing its mobile phone number to activate the NO.1 relay switch, it will reject the call and turn on the connected device without answering, so it will not generate when dialing this machine Call charges, it will identify the authorized phone number that is calling, and refuse to answer the call without answering. It has 5 other independent relay switches, which can be turned on or off by sending SMS text to GSM?RELAY6. 2.Has 6 alarm inputs. When the input is shorted to GND, an alarm will be triggered and an alarm message will be sent. 3.6?channel 250V 10A 50Hz relay contact, the relay can operate almost all equipment, optional relay working mode. 4.Optional password to keep the system in safe operation mode, support remote password operation and password change. 5.One relay output with call mode and the other relay output with SMS control can be easily programmed with mobile phone or PC software. SMS can be used for digital programming quickly and conveniently through SMS or on?board quick teach button. 6.Support free control mode or security authorization number control mode, support custom commands, easy to understand. 7.The DC12V voltage output of the alarm when the alarm occurs, supports the power failure alarm of the rechargeable battery (battery not included). 8.Applications include remote control of heating of holiday houses, lighting, engine preheaters, aircraft engine heaters, irrigation systems, well pumps, pumping stations, cabin heaters, resetting of remote servers, arming and disarming security systems, and door Access control and garage door. Specification: Condition: 100% Brand New Item Type: GSM Remote Controller Material: ABS Color: As the Picture Shown Working Voltage: DC12V Working Frequency: 850/900/1800/ 1900MHz Relay Output: 6 Channels Alarm Input Port: 6 Application: For remote control of heating of holiday houses, lighting, engine preheaters, aircraft engine heaters, irrigation systems, well pumps, pumping stations, cabin heaters, resetting of remote servers, arming and disarming security systems, and door Access control and garage door. PackageList: 1 x GSM Remote Switch Controller1 x USB Data Cable1 x Antenna1 x USB Programmer1 x Instruction Note: This product is 2G, please pay attention when buying in countries where 2G has been disabled.