Protocol: EPC Class1 Gen2/ ISO18000-6C CPU: High speed ARM platform main frequency 800MHZ OS: Microsoft® Windows CE 6.0 / Android RAM: 512MB Memory card: 4G Micro SD standard configuration support 32G at max. 1D module: Symbol SE955 2D module: Honeywell 5180 ( optional) WIFI: WLAN 802.11 b/ g standard configuration Extend module: GPRS module 2.45G module optional Communication interface: USB Slave Audio: Typhoon, support multi-media function Dimension: 200mm* 80mm* 145mm Weight: 703g ( excluding charging base) Key: 27 keys Screen: 4 inch TFT LCD 480* 800 resistive touch screen, backlight adjustable Battery: Rechargeable lithium polymer battery 3500mAh @ 7.4V Operation temperature: -20° C to + 50° C Storage temperature: -30° C to + 70° C Humidity: 5% ~ 95% non-condensing 25 Accessories: 9V/ 1A charging base USB cable US: 902 ~ 928MHz CN: 920 ~ 925MHz EU: 865 ~ 868MHz other standard can be customized Read distance: 7 meters at max. tag dependent Write distance: 3 meters at max. tag dependent