The mouse has 8 customizable buttons and is Logitech FLOW enabled. The 20-degree maximum means that it is not strictly vertical, but the dimensions of the mouse along with the trackball based operation should make it comfortable enough for almost anyone to use. This allows you to set the tilt of the mouse to match your taste and comfort. The ERGO comes with a magnetic hinge, which can be adjusted to tilt the mouse from horizontal to a maximum of 20 degrees. Do you want to comfortably control your smart TV while sitting on the couch with the mouse on your leg? Well, now you can. It also means you can use the mouse on basically any surface, however, cluttered, uneven or slippery it is. This is great for people suffering from wrist/joint pains as the only part of your arm that you have to move your thumb. What this means is that you can move the cursor with little to no arm displacement. Logitech’s ERGO mouse lets you roll the ball with your thumb to move the mouse pointer across the screen. It takes time understanding the trackball concept unless you get a hold of one.

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