This device can not only track position by website and SMS, but also can monitor nearby sound by phone call. 

Features: 
Mini lightweight design. 
GSM quad-band network, GPRS location. 
Tracking via website/SMS. 
Sound monitoring by phone call. 
Recording voice function. 
Support for Google Map, more accurate location. 
Trace replay inquiry. 
Can report battery remaining capacity by SMS. 
Longtime standby. 
With magnet inside, can attach on mental directly. 

Specifications: 
GSM Network: 850/900/1800/1900Mhz 
GPRS Standard: Upload 60, TCP/IP 
External Card: TF Card 
Standby Time: Approx. 12 Days 
Working Voltage: 3.4—4.2V DC 
Working Temperature: -20℃ to 55℃ 
Working Humidity: 5%-95%RH 
Host Size: 40 * 23 * 15mm 
Host Weight: 19g 
Package Size: 10.6 * 7.5 * 4cm / 4.2 * 3 * 1.6in 
Package Weight: 98g / 3.5oz 

Package List: 
1 * Host 
1 * USB Cable 
1 * English User Manual