IM340CFeatures QuadBandGSM/GPRS850/900/1800/1900MHz ComplianttoGSMphase2/2+ GPRSClass10 Outputpower:Class42WforGSM850/EGSM900 Class21WforGSM1800/GSM1900 ControlviaATcommands TCP/IPstack SIMapplicationtoolkit Supplyvoltagerange:3.4-4.5VDC Temperaturerange:-30℃to+70℃(operationalfunctionality) -40℃to+85℃(storagetemperature) Dimensions:50x33x6.2mm Weight:13.8g Voice:FR/EFR/HR/AMR,noisesuppressionandechocancellation PCMaudio,Emergencycalls SMS:TextandPDUmode,Pointtopoint(MO/MT),Cellbroadcast DATA:nontransparent,CSDupto14.4kbps,USSD, Interfaces:2xUARTs,RFconnector,60pinsystemconnector, SIMcardinterface,KeypadandLCD,etc.Accessories GSM/GPRSantennas 60pinsystemconnector SIMcardholder U.FLtoSMARFcable