GSM Listening Devices with Voice Trigger

GSM Listening Devices, with voice trigger, Vibration alarm
1, Quad Band, 850/900/1800/1900MHz
2, Voice Trigger Alarm, Call back to your mobile phone
3, Vibration alarm, call back to your mobile phone
4, Mini size: 44*26*15mm
5, Build in battery 500mah, work 2-3days

How to use
1, open the cover of the card and insert the SIM card in as the indicate direction. This product will automatically start working and it will be in normal standby statement in 30 seconds.
2, audio monitor: Directly dial the number in the alarm locator. You can hear the voice around it after several seconds you dial.
3, Voice-Control Callback: Send 7777# to the alarm locator number, then this machine will reply "voice-control callback has been turned on". When the voice around the alarm locator is over 60 Decibel, it will automatically call the cell phone number set in advance.
Turn this function off, please send 7777# to the alarm locator to cancel the bind.
4, Vibration Alarm: Send 6666# to the alarm locator number, then this machine will reply "vibrate alarm has been turned on". When the alarm locator is removed or touched, it will automatically call the cell phone number set in advance.
Turn this function off, please send 6666# to the alarm locator to cancel the bind.
5, Indicator light: The indicator light will light for 5 seconds and then off when you start the machine. It will flash rapidly when the power is low. It keeps lighting when charging and be off when the power is fully charged.