Feature：1.Scroll smarter: With Signature M650 Wireless Mouse you get line-by-line precision for documents and super-fast scrolling for long web pages; simply switch modes with a flick of the SmartWheel2.The optimal fit for your hand: This comfortable full size mouse is designed for larger hands, for the optimal fit3.Upgrade your comfort: This work mouse provides long hours of comfort thanks to a contoured shape, soft thumb area, and rubber side grips that keep your hand snug and in place4.Connect the way you like: Connect this cordless computer mouse in an instant via Bluetooth Low Energy or Logi Bolt USB receiver Note: The version of Logitech M650 , does not support the original driver, plug and play The product does not include batteries About this item Scroll smarter: With Logitech Signature M650 Wireless Mouse you get line-by-line precision for documents and super-fast scrolling for long web pages; simply switch modes with a flick of the SmartWheel Upgrade your comfort: This mouse provides long hours of comfort thanks to its shape, soft thumb area and rubber side grips that keep your hand snug. Sizes and handedness available Connect the way you like: Connect this cordless computer mouse in an instant via Bluetooth Low Energy or Logi Bolt USB receiver Less noise, more focus: Whether working at the office or at home, Logitech Signature M650 is a quiet mouse, allowing you to enjoy 90 percent less click noise with SilentTouch technology