Specifications: This is a 2.4GHz wireless keyboard with 92 keys and a touch pad. The touchpad has the DPI adjustable function. Mini qwerty 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 Material: ABS Language: English Battery: 2 x AAA Battery (Not Included) Working Range: Max. 10m (Barrier Free) Transmitting Power: Max. +5dB Working Voltage: 3.3V Working Current: <50mA Sleep Current: <1mA Compatible System: for Window 2000/XP/7 Features: Portable, with Touchpad, Ergonomic Notes: (Not Included 2 x AAA Battery) Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Wireless Keyboard 1 x Receiver