... MHz /1800MHz /1900MHzGPRSClass 12,TCP/IP build in GSM MODULEGPS sensitivity-159dBmGPS positioning accuracy(2D RM)10 mGSM ... standbyLess than 25 MaLEDLED light indicates that the GPS,GSM,etc working conditions andOther circumstancesFunction:1, OverSpeed alarm2, ... comprehensive through national 3E, explosion-proof, CE, ROHS certified2,Dual built-in antenna design, waterproof ,dustproof anti-corrosion and ...