Gsm Frequency Channel850mhz/900 mhz /1800mhz /1900mhz GprsClass 12, tcp/ip build in gsm module Gps sensitivity-159dbm Gps positioning accuracy£¨2d rm£©10 m Gsm positioning Accuracy50-300m Speed accuracy0.1m/second Cold-start-38second Warm-start-32second Hot-start-2second Maximum height above sea level18000m Maximum speed515m/second Acceleration of gravity©‚4g Size87*43*14 Weight Working temperature-20--+70 Humidity20%---80%rh Voltage10-50v dc Electricity¡«25 ma£¨12v dc£© ¡«15ma(24v dc) Average current of standbyLess than 25 ma LedLed light indicates that the gps, gsm, etc working conditions and Other circumstances Packaging detail:one piece in one giftbox Size 87*43*14