ST-901M Item Function:
Built-In Backup Battery
Support 9v ~ 50v
ACC Detection(ACC Alarm)
Main power off alarm(With battery only)
Geo-fence alarm & Over speed alarm
For Vehicle/Motorcycle/Scooter
2G VERSION GSM 850/900/1800/1900Mhz
Built-in high sensitivity GPS&GSM antenna,
GPS/GPRS/GSM/SMS Positioning and Tracking
SMS tracking on cellphone with google maps link
Comes with external relay to realize shutting ON and OFF of Engine.