Display 6-inch diagonally and e-ink Resolution: 800 x 600 Eight level gray scale Media format supported text: TXT, PDF and FB2 Image: JPG/BMP Audio: MP3 Storage media SD memory card (up to 8GB capacity) Language English, simplified Chinese and so on Power supply battery type: rechargeable lithium polymer battery , 1300mA, 3.7V, compatible with Nokia BL-5J battery Recharging time: Four hours with USB charging from powered computer Two hours when using AC wall charger AC power: AC charger requires 100 to 240V, 50 to 60Hz and 0.6A Dimension weight: 220g (without package) Measurement: 188 x 120 x 9.5mm (without package) Temperature operating temperature: 0 to 40 degree Celsius Storage temperature: -20 to 55 degree Celsius Hardware specifications: CPU Samsung 400MHz Flash 128MB flash RAM 64MB SDRAM Display 6 inches and e-ink Input/output ports Expansion interfaces USB device: USB mini 5-pin connector SD memory card slot 2.5-inch stereo audio out jack LED green color LED: indicating working status Red color LED: indicating charging status Buttons power switch: power on/off Volume control: up and down Function key: page down and page up Power consuming less than 200mA at 3.3V at EPD refresh time Less than 2.0mA at 3.3V at sleep time It can show ore than 7,000 pages continuously with full charged battery Software specifications: Operating system Linux 2.6 Reader text: TXT, PDF and FB2 Image: JPG and BMP Audio: MP3