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Main features:
1. With password protection
2. Can set 5 groups of control master numbers
3. SMS control(ON command, Off Command, T Command)
   1)ON Command: turn the relay state to ON
   SMS Text: SN+Password+ON
   2)Off Command (Turn the relay state to off
   SMS Text: SN+Password+OFF
4. Free Call to control
   User can control the GSM controller by dial the SIM card number of GSM controller. The user may hear" You can't answer the phone call, beep, beep tone etc", which meanchanging changing the relay state sucessfully.
   If the controller connected, it will change to be disconnected state after a call.
   If the original state is off, it will change to be connected state after a call.
5. Button Control
   The controller state will be changed when you press the SW button at side of controller.
   If the controller connected, it will change to be disconnected state.
   If the original state is off, it will change to be connected state.
6. User can send sms to check the on/off state
   SMS text: SN+Password+CHECK
7. With Power off memory Function

GSM controller, GSM relay, gsm switch

Regards KIMY ZHANG
konlen technology limited
www.aliexpress.com/store/314132

www.aliexpress.com/store/337114

www.konlen.com
15014097067@139.com
Skype: gsmalarmicy