Ev USB Wired Ergonomic Vertical Mouse DPI 500/1000/2000/3500 for PC-Small Size

If you want long lasting similarly vertical ergonomic mouse, then this is not for you. Then again you may not have too many to choose from when it comes to vertically oriented mice such as this. Mine worked for about 9 months and started malfunctioning. My scroll wheel started moving my screen erratically and in the opposite direction to what I tell it to. Through ton of research I did on this behavior I discovered that when any mouse behaves in such a way, the only thing you can do is throw it away. I did.

Looked good in theory. Didn't care for it in practice. It didn't seem to track well and was cumbersome to hold.

I love this mouse. It is a little big even though it is a small one. It has helped eliminate some pain in my hand and wrist. It is very comfortable to hold. I use it 8 or more hours a day.

gives my hand orgasms

Item as described, would purchase from again.