Three devices make Harman's newest in-car audio system unique. The first is Voyager Drive, the second is Voyager Drive+, and the third is the Voyager Soundwear. The last device on that list is a U-shaped speaker you wear over your neck for personalized surround sound. The Voyager Drive+ is an upgraded version of the Voyager Drive, providing a removable subwoofer for your vehicle. The standard Voyager Drive system, including a heavy-duty speaker system in your car with a removable, wireless speaker you can take with you when you need to exit and head towards the beach.