Support web, SMS and Google 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 (TCP/IP). Type: GPS Tracker GSM: 850/900/1800/1900MHz GPRS: Class2,TCP/IP built-in GSM mODULE GPS Module: SIRF Star III/LP GPS Channels: 20 Tracking Sensitivity: -159dBM Acqusition Sensitivity: -144DBM Hot start: Less than 2secs(Open ) Warm Start: Less than 15sec Cold Start: Less than 38sec(Open ) Function Buttons: Power,SOS Power input: Car power supply:7~30v DCnn Antenna: Built-in GSM,GPS antenna with low noise and high gain LED indicator: Three LED indicator GPS-blue,GSM-green,Power-red Features: Online Real-time Tracking, Hidden and Open Installation, LED indicators, Colour:As Shown Material:plastic Package Contents: 1 x GPS Tracker Only 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.