The new Logitech M500s Advanced Corded Mouse is now available on Amazon in the U.S. region. The PC accessory features 7 customizable buttons, high-precision optical tracking, hyper-fast scrolling, Logitech Software Options, soft side rubber grips and more. If you are interested, you can purchase the product from the online retailer with the following link:
In regards to the custom keys, you will be able to set shortcuts such as back navigation, forward navigation, copy, paste, music controls as well as other functions. You will be able to set 400 to 4000 DPI levels as well.
You can see how the Logitech M500s stacks up against the Logitech M500 in our comparison guide.