... bluetooth,printer 2)optional gps, gprs,barcode scanner, rfid,camera 3)4000mah battery 4)SDK,Sourcecode free SPECShandheld ... sizetransflective TFT QVGA color; touch screen ,backlight3.5'',resolution 320x240 dpi ,sunlight viewableOperating Keys20 numeric keys ... 55ºCHumidityDrop test5 - 95% (non-condensing)1.5 m drop onto concreteDevelopment environment Software DevelopmentWindows Mobile SDKProgramming ...