Instead of a singular printed circuit board (PCB) housing the sensor, buttons, and everything else, the DeathAdder V4 Pro opts for three. One is at the bottom of the mouse, with the sensor, battery, and a singular micro-switch for the mouse button. The main benefit of this design is that there is less space between the mouse buttons and the micro-switches. All three components are static inside the mouse housing, and the two halves are connected by a ribbon cable that doesn’t experience any stress during use. The DeathAdder V4 Pro is a great example of everything coming together on a mouse.