GPS Prionser/offender Tracker MT60-X,standby 12days,waterproof,Real-time tracking Supports three working modes:personal mode,smart mode,vehicle mode Easy authorized phone number setup by calling GSM Chipset: SIM 900 (Quad Band 850/900/1800/1900 MHz) Support Remotely monitoring,SOS emergency calling racking regularly by GPRS,LED indication for battery level