Logitech MX master wireless mouse is the flagship mouse from Logitech designed for real power users. This high-end mouse offers comfortable hand-sculpted contour, advanced features, stunning design, and is optimized for Windows and Mac. MX master is equipped with a Smart speed-adaptive scroll wheel, a unique thumbwheel for side-to-side scrolling and more, dark field sensor for flawless tracking, and a rechargeable battery with up to 40 days battery life. MX master can be connected via included Logitech unifying receiver or via Bluetooth low energy wireless technology. Pair up to 3 devices and easily switch between them with just one touch of a button. Install Logitech options software to experience a full range of possibilities of this performance mouse and customize buttons and actions to your needs.