Features: Spill resistant keyboard 3-zone keyboard in compact form factor Island style keys for better accuracy and comfort Optical mouse with 1200 dpi resolution 2.4 GHz wireless connectivity via nano USB receiver Up to 12 months battery life The Lenovo 510 Wireless Combo Keyboard & Mouse compliments your desk with a simple yet elegant design. Easily connects wirelessly with PCs using one Nano USB receiver. The keyboard features a durable water-resistant casing well-equipped to handle the occasional spill. The island keys designed increases typing accuracy and confort. The accompanying wireless mouse has ambidextrous design and features 1200 dpi optical sensor and a 12-month battery life with a single AA battery. Needless to say your chord days are soon to be long behind you.