Yes, that is a Federal Q, the gold standard in sirens. Connected to foot switches accessible by the driver and office.
https://en.wikipedia.org/wiki/Q2B
The front bumper on that engine will also carry two hydraulic reels with 100' of hose on each, dump valves and a trash line. Hydraulics within 100 feet of the apparatus will be provided by an electric pump in a side compartment plumbed to those reels. Electricity will be provided from an onboard hydraulic driven genset. For ops more than 100' out, we will still used the same tools, just connected to a gas powered portable hydraulic pump.