Car gps sms security tracking device with remote control free pc version software google maps link real time tracking. features: *remote control with alarm on/off function. gps/gsm station positioning. *sms/gprs/internet network data transfer. point-to-point, point to group, group-to-group monitoring. *support 9-36v, so it can be installed on bus, taxi, truck ,personal car, business car etc. *absolute street address with gsm network. sd card for data logging. continuously auto track upon different time and distance intervals. *main functions: sos, geo-fence, movement alarm, over speed alarm, accident alarm, voice monitoring etc.remote control with alarm on/off function.