Specifications Processor / Chipset: XScale PXA300/310 624MHz Operating System: Microsoft® Windows Mobile® 6.1 Professional Memory: 64MB/128MB mDDR Storage: 1GB-4GB Expansion: MicroSD Card Slot(compatible with up to 32GB SDHC) Display: 3.5” transflective TFT LCD, QVGA resolution (240 x 320) Battery: 3.7V 2500mAh Rechargeable Li-ion (Backup battery included) Application Buttons: 28 keys including Navigation ,Function and Numeric Key Image: 1/4 Inch 2 Mpixel color camera I/O Inerfaces: RS232, USB1.1 Device+Host, Modemx1, SDIOx1, SPIx1, IICx1 Dimension & Weight: 158(L) X 84(W) X 39(H) mm, 345g Wireless: 802.11b/g WLAN, Bluetooth v2.0 +EDR Communications: GPS SiRFIII (optional), GPRS/CDMA/EDGE/EVDO/HSDPA (optional) Environment: * Operating Temperature -10 to +50C * Storage Temperature -40 to +60C * Operating Humidity 5% ~ 95% none condensing Rugged Rating: * IP64 HF RFID Reader: Supported Tags: ISO15693,ISO18000-3,ISO14443A,ISO14443B, ISO 14443C, Inside PicoPass Frequency: 13.56MHz Reader Range: Max. Read Range: 4cm (ISO15693) Minimum Write Range: 2cm (ISO15693.