Dial device, you could hear the sound around.
Also it will automatically dial your phone once the sound is over 45db.
It can be used for remote monitoring, home surveillance, automotive anti-theft tracking,child custody
This is Quardband Mirco Audio Bugs, Remote Surveillance Listening Device
Example: If you are not home, someone goes to your room with noice, you will be alerted at once through your phone!
Two-way mode sound activated GSM voice bug with Call back function /listening device/audio monitoring
Using 2G GSM SIM Card (just as call to destination mobile phones). Not Support 3G/4G Sim Card!!!
Remote control to turn on/turn off call back function by mobile's SMS only
Unlimited distance & cross-over countries, only if there is GSM singal !