This is a 2.4GHz wireless keyboard with 92 keys and touchpad. The touchpad features adjustable DPI. Mini keyboard with multimedia control keys and PC game control keys. Automatic sleep and power-saving modes help conserve energy. Ergonomic handheld design for easy carrying and comfortable operation. Item Name: Wireless Keyboard Type: Three-color backlight Language: English Battery: Lithium Battery Working Range: Up to 10 meters (barrier-free) Transmitting Power: Up to +5dB Working Voltage: 3.3V Working Current: Less than 50mA Sleep Current: Less than 1mA Compatible Systems: Windows 2000, XP, 7 Features: Portable, Touchpad, Ergonomic Color: Black Material: Plastic Size: 14.8 x 9.8 x 2 cm Package Contents: 1 x Keyboard 1 x USB Receiver 1 x USB Cable 1 x English Manual Note: The package includes only the items listed above. Other products are not included. Note: Lighting effects and different display screens may cause slight color differences between the image and the actual item. Measurement error allowed is +/- 1-3 cm.