.   . Quiet clicks . without compromising on performance. Waterproof membrane keys. for comfort and protection meaning spillages will not affect performance. Compatible. with Windows and MacOS no installation required simply plug in the USB. 1 Year Warranty . The Lenovo Essential wired keyboard and mouse combo keeps things uncomplicated. Simple wired USB connectivity means you can just play and play without the need for drivers or software installation. The keyboard was designed with a modern space-saving look for work or personal use and includes waterproof membrane keys meaning spillages will not affect performance.The membrane keys give feel-good typing and quiet clicks without compromising on performance the device offers a full UK layout with a number-pad. The mouse has an ergonomic feel and keeps things basic with its stylish yet robust design but offers high detailed performance with its 1000dpi technology..