Yup, besides the wheel, there are 5 configurable buttons (and the wheel has left/right too).
2 buttons by default can be configured to change DPI on the fly. You can set 3-5 steps of DPI, I use 3 and there’s an LED display marking the step. So for running around as infantry I use 1600-2000 DPI and in tanks I use 5700 DPI. Because the sensitivity is set the same all the time, the mouse moves your cursor faster at higher DPI. In tanks it moves the turret a LOT faster.