Fangrui Product Details This Is A 2.4ghz Wireless Keyboard With 92 Keys And Pad. The Touchpad Has The Dpi Adjustable Function. Mini Keyboard With The Multimedia Control Key And The Pc Game Control Key. Automatic Sleep And Automatic Wake-up Modes Can Save Energy. Ergonomic Handheld Design, Easy To Carry And Operate. Item Name: Wireless Keyboard Language: English Battery: Lithium Battery Working Range: Max. 10m (barrier Free) Transmitting Power: Max. +5db Working Voltage: 3.3v Working Current: Less Than 50ma Sleep Current: Less Than 1ma Compatible System: For Window 2000/xp/7 Features: Portable, With Touchpad, Ergonomic Colour:black Material:plastic Size:14.8x9.8x2cm Package Contents: 1 X Keyboard 1 X Usb Receiver 1 X Usb Cable 1 X English Manual Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different Displays May Cause The Color Of The Item In The Picture A Little Different From The Real Thing. The Measurement Allowed Error Is +/- 1-3cm.