Make scrolling work for you with Logitech SmartWheel. Get line-by-line precision when you need to focus on the details, and scroll super fast when you just want to breeze through lengthy pages. Automatically switch modes with the flick of your finger. You’ll enjoy working with your Signature M650. Each mouse features a contoured shape, soft thumb area, and rubber side grips that keep your hand snug and in place. Get more comfort and focus more on what you need to get done.