Spy GSM Bug

This product adopted the German military technology. It has the voice control function which can Dial-Back automatically. For it has the feature of compact size, clear voice, long standby time, supplely operation, stable performance, easily installation. External control and also plus a flashlight function, it can be used for remote monitoring, tracking , home surveillance, automotive anti-theft tracking.etc.
It works with Tri-Band system at 900/1800 MHz only (Not for 3G or CDMA phone network)
Features:
* Frequency: 900, 1800 (note: check if it can be used in your country)
* Embed condense microphone.
* All GSM SIM card compatible
* Microphone range: about 20 Meters (diameter)
* Receive sensitivity: -+ 10K
* Working temp: -40~50 degree C
* Responding frequency: 1.2K~800 KHz
* Stand-by time: 3-5 days (using voice control function)
                              6-15 days (don’t use voice control function)
                              30-40 hours (flashlight available)
·         Dimension: 2.2 x 1.4 x 0.52 inch
 
Operation:
 
    Put SIM card inside; hold the button to” A" and send sms "GDM" by cell phone to the inserted card; hold the button to" B"    and it's in sound-activated mode, will dial the cell phone back when there is sound. Hold the button to” A" and it's not in sound-activated mode; dial the inserted number when you want to check its surrounding.