Multi-mode Wireless Ultra-slim Keyboard & Mouse Combo • Connect via Bluetooth 3.0, 4.0 and 2.4 GHz • Intelligently switch among up to 4 devices • Ultra-slim 4.0 mm keyboard design • Aluminum alloy frame and back base • Fn multimedia hotkeys • Chiclet keys and scissor key structure • Precision on nearly every surface • Adjustable 600-3200 DPI sensor • 9 buttons including a side scroll-wheel • Bulti-in 800mAh Li-ion rechargeable battery • Up to 30 days with full charge(Mouse) • Up to 12 months battery life(Keyboard) • Nano USB receiver, plug and play