WIRELESS COMFORT: Contoured, ergonomic shape follows the natural curves of large hands. Place your fingers in the ideal position thanks to the recessed buttons for comfort from morning to night WIRELESS CONNECTION WITHOUT LAG: Absolute freedom with the wireless connection up to 10 meters and a clear desk.< /p> HIGH-QUALITY PRECISION: Don’t sacrifice quality in the office. Precision tracking, line-by-line scrolling and simple navigation turn missed clicks into bad memories. which you can count. It is reliable and made to last