Introducing the 9900M: Your ultimate wireless productivity powerhouse. Seamlessly connect via Bluetooth 3.0, 4.0, and 2.4 GHz, and effortlessly switch between multiple devices in one click. The ultra-slim 4.0 mm keyboard boasts an aluminum alloy base for durability and style. Accompanied by an adjustable 3200 DPI mouse with a laser engine for precise control. Plus, enjoy the convenience of an eco-friendly rechargeable battery for the mouse.