Griffin Technology has updated its RoadTrip iPod and iPhone cradle in-car audio adapter to work with the iPhone 4 as well as previous models. 

The iPod accessory now sports a more robust design and improved touch-sensitive keys that allow a passenger to select tracks from the iTunes library to play. The Griffin RoadTrip works with all versions of the Apple iPhone as well as the iPod Classic and iPod touch. It makes use of the radio built into a vehicle and scans the airwaves for an available frequency over which it can broadcast the music, podcasts and audiobooks stored on the iPod. 

The device is available from Tesco and costs £59.99. It works with or without the pictured iPhone 4 bumper.