Introducing Logitech MX Master 3S - a productivity mouse for ultimate tactility, precision, and flow. Quiet Click buttons deliver a satisfying tactile feel with 90% less click noise (2). MX Master 3S also with an 8K optical sensor for next-gen responsiveness on any surface - even glass (1). MagSpeed electromagnetic scrolling delivers remarkable speed, precision, and near silence - with the ability to scroll 1,000 lines a second. The ergonomic silhouette is crafted to support your palm and fingers. Logi Options+ app enables Flow cross-computer control and introduces more customizations than ever(5). MX Master 3S stays powered up to 70 days on a full charge(7) - and delivers three hours of use from a one minute quick charge. Charging cable not included. This is Bluetooth Edition - "NO DONGLE IN THE PAKCAGE."