Product size: 188 x 118 x 9.25mm Display 6 inch E-ink display Technology: E Ink 6 electronic paper Screen size: approximately 6 measured diagonally Resolution: 800 x 600 pixels Grayscale: 4-level grayscale CPU: ARM RISC S3C2440 Frequency: 400MHz Operating system: Linux Format text: TXT, adobe PDF, HTML, and fb2 Image: JPG and BMP Embedded memory: 75MB File-system: FAT 16/32 Extend memory: SD card Character font: mobile font Language: Russian, English, and Chinese Download USB2.0 Audio: MP3 Battery type: rechargeable lithium polymer Battery capacity: 750mAh Nominal voltage: 3.7V Standby batteries can last three days, and support to browse 4,000 pages Packing information: Quantity: 40 pieces/carton Carton size: 47 x 31 x 53.5cm Weight: 28.80kg/carton