I can configure my Razer Naga v2 Pro such that, while I hold down a button, it will repeatedly click that button at the frequency that I configure.
For instance, I can configure it to "left click" anywhere between 1-7x per second, while I hold the mouse button down. When I let the button up, it stops firing left clicks.
This would be even better with deep click because it could be single click up to 50% and then engage multi-click past that, which would be the best of both worlds!
Note: This is not the same as adding inputs to the same button; this continuously fires the same event (at the configured frequency) whist you hold down the mouse button. The last thing you want is to add 4 click "inputs" per single click.
This is useful in some FPS games where you're carrying around a semi-auto and you want to:
1. Increase the lifespan of the switches in the mouse
2. Fire rapidly with less finger strain and more accuracy.
I can click 3-4x per second accurately and without affecting my mouse movement but after that it starts to affect my aim. Having the ability to "hold" the mouse and it does the clicking for me increases overall accuracy and click rate.
I've only had the Z2 out of the box for an hour and I'm already missing that feature.