Main display: 6-inch E-ink panel Display controller: PVI display controller Backlight: no backlight without no any radialization Display size: 6 inches (800 x 600 pixels) Processor: Arm9 Core (Samsung S3C2440) Operating system: Linux 2.6 RAM memory: SDRAM 1GB Battery: lithium ion 920mAh Battery lifespan: 11000 screen refresh (estimated 3 months based on reading speed of 500 pages per week) I/O: 3.5mm stereo audio jack for earphones USB port Connectivity: high speed USB client Built-in Wi-Fi (IEEE802.11b/g) (optional) SD card: up to 8GB, supports SDHC Format support (with cyrillics supporting): PDF, TXT, CHM, FB2, HTML, JPG Audio format supported: MP3 (32 to 384Kbps), WMA (32 to 192Kbps) Font size changing function: 5 sizes Other features: search book by filename, auto-resume Page number indication: yes Languages: English, French, Russia, Dutch, and German (can be customized) Grayscale: 4 level Accessories: gift box packaging, IB (English with 128gsm woodfree paper), stereo earphones, USB cable (1m long), battery (mercury free), USB charger, and leather case