The MX Ergo S Plus is Logitech’s most advanced ergonomic trackball mouse yet, with a 20-degree tilt angle and a 10-degree detachable wedge, and precise thumb control - user-tested and certified by United States Ergonomics. The MX Ergo S wireless ergonomic mouse is sculpted to fit the palm of your hand while keeping it relaxed, and it tilts 20 to 30 degrees for 27% less muscle activity in the forearm, providing elevated comfort throughout your day. Work faster with 6 customizable buttons and a DPI button to effortlessly switch between speed and high-precision tracking. Now with 80% quieter clicks. For even more control that's tailored to your needs, assign time-saving shortcuts and Smart Actions using the Logi Options+ App. Connect your wireless mouse to 2 devices via Bluetooth or the included Logi Bolt receiver and switch between devices with a click of the Easy-Switch button.