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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: Built-in Lithium 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 Size: 14.6cm x 9.7cm x 1.9cm/5.75" x 3.82" x 0.75" (Approx.) Notes: 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