... in SD card .Besides ,following features are all available:1)The minimum interval for data sending of TK102 is 30 seconds, for ... direction, altitude, battery voltage, charging status, number of satellites, the length of the GPRS string, GSM ID (includes MCC, MNC, cell ID ... . It will send an alert of low battery to the user if the battery is low.Size: L210mm * W126mm * H58mmWeight : 0.44kg ...