inland 7339 Silver & Black 5 Buttons 1 x Wheel USB or PS/2 Wired Optical u-Navigator Office Mouse

Works like it should, standard USB mouse with PS2 adapter.

You aren't able to change the function or the menu of the special "6th" button.

Works like it should, standard USB mouse with PS2 adapter. Has the standard 3 buttons, left, right, and middle(wheel button). Plus it has 2 side buttons configurable to what you want, and one final button, the "6th" button, that brings up a menu that...

You aren't able to change the function or the menu of the special "6th" button