... other function such as magnetic pin, built in shock sensor to control power saving, these functions are also ... is 15 days (standby mode), over area alarm, over speed alarm, emergency SOS help, these functions are useful. ... .3.5)Warning: this tracker only uses the 9-28V DC power supply, too high voltage or ... some tracking maybe lost, this is normal.8.9)Some time some location point is lost, this is ...