Features: Brand new and high quality Larger touchpad, dual mouse left and right button design, support multi-finger touch, more convenient operation. Adjustable mouse speed, two-speed adjustable. Bluetooth-compatible +2.4G dual-mode wireless keyboard with backlight. Palm-sized gaming keyboard, independent left and right buttons, easy to use. QWERTY keyboard. Ergonomic Design. Innovative full-screen scrolling function. Specifications: Product Name: A8 Keyboard Product color: Black Product features: 2.4G+Bluetooth-compatible dual mode Operating range: up to 10 meters Transmit power: +5db Max. Charging method: built-in battery Battery capacity: 300mAh Working voltage: 3.3V Working current: < 50mA Charging current: < 300mA Sleep current: 1mA Computer system requirements: For Windows 2000 For Windows XP For Windows Vista / Windows CE / Windows 7 For Linux(Debian-3.1,Redhat-9.0 Ubuntu-8.10 Fedora-7.0 test) Dimensions: 146.8 x 97.5 x19mm Weight: 110g In the upper left corner, you can adjust the previous and next music, pause, mute, and sound volume; in the upper right corner are the four direction keys and the confirmation key Fn+F2=3 color LED backlight & backlight (optional) FN+F3=Bluetooth-compatible connection Package Includes: 1 x Mini Air Mouse Keyboard 1 x USB Adapter 1 x Data cable 1 x Instruction Manual 1 x Box note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement.