1.real time industrial GPS watch tracker 2.good quality & service 3.best price GSM GPRS GPS watch tracker for kid/elderly/car GSM moduleGSM850/900/1800/1900 MHzGPS sensitivity-163dBmGPS center frequencyL1, 1575.42MHzGPS Location accuracy5-25 mGSM Location accuracy100-500 mSpeed accuracy0.1m/sTime Location accuracySynchronous with GPSDefault dataWGS-84Hot-start1sWarm-start38sMax Height above sea ...