1,build-in scanning module 2,GPS,camera, RFID for options 3,WIFI, ... High-capacity data processing: with 512M ROM memory, 128M RAM and 533MHz CPU memory, processing speed, up to 16G TF ... 0.01m/sExpansionInternal HF RFID Read WriteExpansionInternal Wireless Communication module GSM/GPRS,Support GSM/GPRS Class10,GSM27.10 Power ... across operating temperature range. CertificationCCC,CE GPS handheld computer