. Meet MK540 a wireless keyboard and mouse combo built for precision comfort and reliability. The full-size keyboard features a familiar key shape size and feeling - optimized for precision and noise reduction. The palm rest and adjustable tilt legs keep you comfortable for long stretches and the contoured mouse is designed to fit perfectly into either palmKey Product Info . PLUG AND PLAY WIRELESS COMBOFAMILIAR TYPING EXPERIENCECONTOURED COMFORT MOUSEPRODUCTIVITY AT YOUR FINGERTIPSRELIABLE AND HASSLE-FREE Product Features PLUG AND PLAY WIRELESS COMBOConnect your keyboard and mouse with one tiny Logitech Unifying USB receiver. You\'ll get a reliable and encrypted wireless connection up to 10 meters away with virtually no delays or dropouts FAMILIAR TYPING EXPERIENCEThe keys have been optimized for improved accuracy and reduced noise and your fingers will immediately feel at home on the familiar key surface and layout. The palm rest and adjustable tilt legs keep you comfortable for long stretches at the desk CONTOURED COMFORT MOUSEThe wireless mouse\'s contoured shape and soft rubber side grips are designed to fit comfortably in either your right or left palm - and enhanced tracking and precise cursor control keep you in command PRODUCTIVITY AT YOUR FINGERTIPSConvenient and essential hot keys give you direct access to media calculator and battery check functions. Preset Fn keys can even be personalized in Logitech Options to meet your specific needs RELIABLE AND HASSLE-FREEYour keyboard won\'t require new batteries for 36 months and your mouse stays powered for 18 months. The keyboard is spill resistant to 60ml of liquid and abrasion resistant key printing ensures your keys won\'t quickly fade What\'s in the box? . Wireless Keyboard K540Wireless Mouse M310Logitech Unifying receiver3 AA alkaline batteries (pre-installed)User documentation