Features 1、GSM‑RELAY6‑3G is a wireless 3G remote control switch connected to a 3G mobile phone network. It has 6‑channel relay output. It also has 6 alarm inputs. When the input is shorted to GND, an alarm will be triggered and an alarm message will be sent. 2、Has six independent relay switches and activates the NO.1 relay switch by dialing its mobile phone number. It will reject the call and turn on the connected device without answering, so it will not be Incurring call charges, it will recognize the authorized phone number that is calling, and refuse to answer the call without answering. There are 5 other independent relay switches, which can be turned on or off by sending SMS text to GSM‑RELAY6‑3G. 3、6‑channel 10A 50Hz relay contact, the relay can operate almost all equipment, the working mode is optional, built‑in 3G module, can work anywhere in the world through 3G and GSM Net. 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. Support rechargeable battery power failure alarm (bettery is not included), DC12V voltage output of the alarm when an alarm occurs. 7、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: UMTS: 850/900/1900/2100MHz GSM/EDGE: 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. Package List 1 x 3G/GSM Remote Switch Controller 1 x USB Data Cable 1 x Antenna 1 x USB Programmer 1 x Instruction