... ,thermal printer 2)RS232,optional 1D scaner, rfid,camera,gprs 3)4000battery SPECShandheld pda with thermal printerOSCPU WINCE5.0,MOBILE6.0, support ... +2 custom keysenclosed stylus or fingertipsupport Mouse and keyboard by USB portCommunicationWLAN USBSerial port Audio GSM/GPRS/3GBluetooth 802.11b/g1 ... USB 1.1 Host,1 Client 1 RS232 serial portbuilt-in mic; Speaker and 3.5 ...