The mod adds the Tatra 815 fire brigade. You can use Tatra to solve many emergency situations, be it a traffic accident, technical assistance or fire fighting. The mod includes an active water cannon, with which you can extinguish fires.

Control:
Start/cancel an emergency (mission) – CTRL + U
Carriage location - X
Turn on the water in the gun - B.
Water Cannon Mouse
Tightening/loosening Tension belts – L
Lighthouses - Home
Rear LED Warning Panel – CTRL + Home
Siren — CTRL + 1 (numeric keypad)
Additional controls (Kubota DLC required)
Passenger seat — CTRL+G

The mod definitely requires Interactive Control and Emergency Pack.