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: 850/900/1800/1900MhzGPRS Standard: Upload 60， TCP/IPExternal Card: TF CardStandby Time: Approx. 12 DaysWorking Voltage: 3.4—4.2V DCWorking Temperature: -20℃ to 55℃Working Humidity: 5%-95%RHHost Size: 40 * 23 * 15mmHost Weight: 19gPackage Size: 10.6 * 7.5 * 4cm / 4.2 * 3 * 1.6inPackage Weight: 98g / 3.5ozPackage List:1 * Host1 * USB Cable1 * English User Manual