The Lenovo essential wired Combo keyboard & Mouse keeps things simple. This durable keyboard and mouse plugs into any USB port with wired reliability you can count on. The tough waterproof membrane can handle accidental spills without risking performance. Enjoy feel-good typing with quiet keys and number pad in a modern space saving layout. An ergonomic full size mouse offers comfort and support for all day use. Increase your productivity as you smoothly complete tasks with the 1000DPI high resolution Optical sensor. Button Life Up to 500,000 cycles and Keyboard Key Lifecycle Up to 10 million clicks.