Features: CPU: ARM9 200MHz SDRAM: 32MB Flash: 12MB Display and screen: 5-inch, monochrome reflective display, internal reflective display, e-paper Resolution and color: VGA 640 x 480 pixels, 16-gray scale display Memory card slot: SD card Battery: 2,800mAh rechargeable lithium-ion Maximum battery life: up to 22 hours, standby time one month Battery charge time: AC charger 4 hours OS: Linux Dimensions: 154 x 110 x 13.5mm Weight: 215g Formats: EBA, EBAML (EBA2.0), TXT, PDF, BMP, JPG, GIF, animated GIF, MP3 Connectivity: USB Voice technology: text to speech (TTS) (only supports TXT, EBA, EBA 2.0) Packing: Carton size: 46.0 x 36.5 x 25.5cm Quantity per export carton: 10pcs Carton gross weight: 8.2kg Units per 20ft GP/40ft GP/40ft HQ: 7,300/15,000/17,000pcs Accessories: Power adapter USB 2.0 cable Storage pouch User's manual Bonus CD USB cable