2 scroll wheels mice

2 scroll wheels

— the mouse has a second scroll wheel, in addition to the main one. In modern models, this wheel is usually located on the side, under the thumb, but other options are possible — for example, on the upper side, next to the main one. In general, this feature expands the capabilities of the mouse: the second wheel can be used for horizontal scrolling, zooming and other additional functions. On the other hand, such equipment affects the dimensions and price, despite the fact that similar capabilities can be provided with one wheel — the so-called 4D wheel. Therefore, mice with two wheels are quite rare.