Display: 6-inch Type: monochrome reflective display/internal reflective display STN Resolution: 320 x 480 Color: 16-gray scale display Memory card slot: SD card Battery: 2,000 to 2,500mAh and 3.7V Maximum battery life: 20 hours Battery charge time AC charger: 4 hours Battery charge time PC USB: 6 hours Operating system: Linux Dimension: 188 x 124 x 11.5mm Weight: 295 grams Formats: TXT, PDF, HTML, BMP, JPG, GIF, PNG and MP3 Connectivity: USB Accessories: stereophonic earphones, chargers, USB, user's guide and leather case (adapting) Main functions: E-books with various formats such as TXT, PDF, HTML, CMH, HTXT are allowed and there are such functions as zoom, interface shifting, page jumping, bookmark, auto-flip and search books It has many powerful functions including blog-daily, complete keyboard entry and password setting Audio with different formats of MP3, WMA and more are allowed Pictures with different formats of JPG, JPEG and GIF are allowed Perfect design like screen with super-large area of 6 inches, delicate appearance and comfortable hand touch Convenient additional functions such as computer, e-calendar, alarm clock and time display Mass memory: a memory card with capacity of 1GB can store 0.5 billion Chinese characters SD/MMC is supported to extend memorial capacity Text-to-speech can be update