1,build-in scanning module 2,GPS,camera, RFID for options 3,WIFI, GPRS/GSM, Bluetooth interface 4,Widely ... data loss and other power5. Extend hardware options: GPS, camera, RFID, etc.6. Built-in one-dimensional scanning module7. Communication mode ... GPS:Channel 48,Accuracy 2.5m,In motion 0.01m/sExpansionInternal HF RFID Read WriteExpansionInternal Wireless Communication module GSM/GPRS,Support GSM/GPRS ...