CPU: ARM9 with 32bit RISC S3S2440, the highest frequency 400MHz (P) DRAM: 64MB Display: 6-inch E-ink display Technology: E-ink 6 electronic paper Screen size: approximately 6-inch (measured diagonally) Resolution: 800 x 600 pixels Grayscale: 4 level grayscale Data communication interface: USB device 2.0 Data flash: Nand flash, 512MB Extend storage: SD card support to 4GB Buttons: Power switch: power on/off Function keys: up/down/left/right/enter/cancel/return/menu/music Power: rechargeable lithium battery Battery capacity: 3.7V, 1,000mAh Dimension: 188.42 x 118.24 x 9.24mm Weight: 180g OS: Linux 2.6.18 Reader format: HTML, TXT, FB2, RTF, DjVu, PDF, ZIP, JPG, PNG, and MP3 Language: English, Russian, Latvian, and Chinese Other languages can be customized upon customer request