Dimension:109*73*22mm Weight: 199g (30GB Hard Disk) Display: 1.8 inch Dot Matrix TFT LCD; resolution 280X220, 262 thousand colors Battery: built-in Lithium ion 1100mA/H rechargeable.10 hours at most (Play MP3 State) Charge Parameter: current 500mA at most, charge time 1.5-2hours Working Current: 1. 50mA (Play MP3, low backlight, close hard disk) 2. 85mA (Play MP3, high backlight, close hard disk) 3. 700mA(Play MP3, open backlight, read & write hard disk) 4. 1.45A(The most working current, hard disk starting moment) Working Temperature:0-40 degrees Power Adapter: 90-230V/50-60Hz AC; 5V/500mA DC (Alternative) Storage: 2.5 inch（20GB-80GB）HDD