... ,GPRS, RFID reader is optional 3.5" PDA ,handhelds,handheld device,handheld terminals, with barcode reader,GPRS, RFID reader is optional1.Operation ... /6 times drop to concrete11. Temperature: Operating temperature:-20 to 50 Storage temperature:-20 to 5512. Communicate on: USB /Wifi/CDMA/GPRS ...