Do not need to provide a remote control for different users
Two digital inputs for door sensor， motion sensors or other sensors to protect your door and windows. When any one of the configured numbers is triggered， it will send an SMS alert message and start the siren immediately
One output with relay rating 3A/240VAC for connecting with the switch of the door or machine
The relay action will return an SMS confirmation to the owner
Based on a GSM network， with many possible applications
