• Works  with GSM phones  and SMS command
• Operating temperature (-10 .. +60 °C) 
• Three alarm mode optional (Phone calling alarm, SMS alarm or both )
• Maximum three numbers can be programmed for SMS alarm
• Maximum three numbers can be programmed for Phone call alarm
• Working voltage is at DC5-15V
• One alarm input and one alarm voltage output
• Alarm SMS can be customized with user's text
• Optional battery inside for power failure alarm
• Low-power design after mains power-down, allowing built-in battery to provide continuous monitoring for around 30 days

GSM Alarm box GL09PLUS

• Works  with GSM phones  and SMS command
• Operating temperature (-10 .. +60 °C) 
• Security hardware program protection line to keep the system at safety operating mode.
• Three alarm mode optional (Phone calling alarm, SMS alarm or both )
• Working voltage is at DC5V to DC16V.
• Realtime measure the battery voltage for Low voltage alarm to protect the battery
• Power-save sleep working mode can be selected to extend the working hours of the battery
• Only around 30uA DC12V power consumption during power-save mode
• One alarm voltage output, which can be used for siren alarm

GSM Alarm box GABP

• Two pcs CR123A battery for power supply
• SMS alarm message would be sent to maximum 3 preset mobile phones when alarm triggered
• Also can preset 3 mobile phones for dial to alarm when any alarm input triggere
• Alarm SMS can be customized
• Support SMS alarm ,phone calling alarm