Hey,
Basically i want to fit a siren and microphone unit to my car for a bit of fun, I'm 100% not going to use it whilst on the road as i already know thats illegal, but for example using the ice cream van sound as a joke with some mates. All i want to know is if its illegal to have such a box fitted.

Thanks

PLEASE VOTE 1 BEING LEGAL AND 2 BEING ILLEGAL

It's highly illegal to have this fitted over here. One's car will pretty much get impounded and the prospects of arrest are very likely.

I was hoping I'd be allowed it as long as not used to impersonate a policeman

I think it's legal here in the states, depending on what state you're in. Some decommissioned police cars are sold to the public with the siren and some lights intact but disabled. I did hear about a guy who re-wired the siren and lights and used them to impersonate a cop, so who knows how long it is before they change the way they prepare cars for sale.

i would assume the mic is legal as per the speaker cars that play electoal messages. as for the siren, i think best leave that off as you could, if you are desperate, play siren noises through the mic.