Panel: 6-inch E-ink display Backlight: no backlight without any radialization Processors: Xburst core (JZ4750), 360MHz Xburst CPU Operating system: Linux Greyscale: 16 level I/O ports: USB 2.0 ports: 1 Headphone jack: 1 SD/MMC card: 1 Internal I/O connectors: Display panel connector: 1 LED: 1 (dual color - red for charge and green for power) Speaker: 8 ohms, 1W Internal mic: 1 (optional) 3G module: 1 (optional) Wi-Fi: 1 (optional) Key button function: Power button: 1 Reset button: 1 Push button: up, down, left, right, enter, home, menu, back Software features: Reader open, close, zoom, bookmark, front/next page, to designated page Formats: PDF/TXT Music player open, close, play, pause, stop, front/next Formats: MP3/WMA Picture browser open, close, browse Formats: JPG/BMP/PNG/TIF Language: Chinese, English, Spanish, Italian, French, Russia, Dutch (can be customized) Key button nenu: home, up, down, left, right, ok, back, restore, and power System setting time, power control, volume control, language, storage, about 7 boot-strap interface (optional) Accessory: Battery Li-ion: 3.7V, 1,100mA Headphone: 3.5mm Manual OSD operating manual Charger: 5V, 1A Data cable: 1.2m Pen: 1 Warranty card: 1 Packing leather cover, color box, paper pallet, PE bag Packing size: 180 x 168 x 60mm