Logitech Signature M650 L LEFT - Mouse - large size - left-handed - optical - 5 buttons - wireless - Bluetooth, 2.4 GHz - Logitech Logi Bolt USB receiver - off-white. 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.