Support web, SMS and map link, no need of platform registration.It needs password to make and change any setup, protect your privacy.Built-in turn on/off power, supports 7-30V input voltage, suitable for all cars.It can take power supply from car lighter or car storage battery.It can detect and fix some problems by built-in monitor CPU.It can accurately position even when the signal is weak.Two way locating methods based on MBS and GPS.Location inquiry by SMS or GPRS (IP).Type: GPS TrackerGSM: 850/900/1800/1900MHzGPRS: Class2,IP built-in GSM mODULEGPS Module: SIRF Star III/LPGPS Channels: 20Tracking Sensitivity: -159dBMAcqusition Sensitivity: -144DBMHot start: Less than 2secs(Open )Warm Start: Less than 15secCold Start: Less than 38sec(Open )Function Buttons: Power,SOSPower input: Car power supply:7~30v DCnnAntenna: Built-in GSM,GPS antenna with low noise and high gainLED indicator: Three LED indicator GPS-blue,GSM-green,Power-redFeatures: Online Real-time Tracking, Hidden and Open Installation, LED indicators,Colour:As ShownMaterial:plasticPackage Contents:1 x GPS TrackerOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.