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OTP-GSM103 Smoke Alarm GSM Monitoring

GSM Listening device


  • Voice active monitoring .
  • Built in adjustable sensitivity voice active microphone.
  • Built in High sensitivity monitoring amplifier microphone
  • Built in phone number filter function, other phone will not allowed to monitoring.
  • Can used SMS to set active or deactivate sound active mode.
  • Built in shock alert active function, will call and send SMS when detect shock alert.
  • Easy to operate, just install SIM card and SMS setting for all function modes
  • AC power supply directly, without worrying about Working time.






GSM band module: 900/1800/1900 MHz
Voice sensitive: -75db
Power: Battery and AC power supply
Standby power consumption: 3.7V, 20mAh
Working power consumption: 3.7V, 200mAh
Filter mode: 4 sensitivity voice filter
Alert mode: 3 SMS number&1 calling number
Control mode: SMS control


User's Manual Download: