MC55Features TriBandGSM/GPRS900/1800/1900MHz ComplianttoGSMphase2/2+ GPRSClass10 Outputpower:Class42WforEGSM900 Class21WforGSM1800/GSM1900 ControlviaATcommands TCP/IPstack SIMapplicationtoolkit Supplyvoltagerange:3.3-4.8VDC Temperaturerange:-20℃to+55℃(operationalfunctionality) -40℃to+85℃(storagetemperature) Dimensions:35x32.5x3.1mm Weight:5.5g Voice:FR/EFR/HR/AMR,noisesuppressionandechocancellation PCMaudio,Emergencycalls SMS:TextandPDUmode,Pointtopoint(MO/MT),Cellbroadcast DATA:nontransparent,CSDupto14.4kbps,USSD, Interfaces:2xUARTs,RFconnector,50pinsystemconnector, SIMcardinterface,KeypadandLCD,etc.Accessories GSM/GPRSantennas 50pinsystemconnector Flatcableforconnector SIMcardholder U.FLtoSMARFcable