iPod product-seller iWorld is marking the 8 December legalisation of FM transmitters with a free giveaway.

The devices will become legal for purchase, sale and use in the UK this Friday, 8 December. To mark this day iWorld is offering a free iStuff iPod Car Charger (price £13.99) with every FM transmitter purchased through its website.

The site has also produced a page detailing information about FM transmitters, and claims that all transmitters sold on its site carry a legally required European 'CE' mark.

The company sells the popular Griffin iTrip, alongside its iStuff iCast transmitter and XtremeMac's AirPlay 2.