MK540 Advanced is an instantly familiar 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 palmrest and adjustable tilt legs keep you comfortable for long stretches and the contoured mouse is designed to fit perfectly into either palm. Plug and play your keyboard and mouse with one tiny USB receiver with Logitech Unifying technology. You’ll get a reliable – and encrypted – wireless connection up to 10 meters away with virtually no delays or dropouts. Your keyboard won’t require new batteries for 36 months and your mouse stays powered for 18 months.