The 150 cubic-inch (2.5-liter) speaker box is made from half-inch plywood, and contains two 6 x 9-inch speakers, a 240-watt amplifier, a rechargeable sealed lead acid battery, and a line-in port. Users must hard-wire their own music player into that speaker, or purchase a third-party Bluetooth receiver. One charge of the battery is reportedly good for 6 to 12 hours of use.
If desired, the box can be detached from its rack, allowing either component to be used on its own. Rain shouldn't be a big problem, as both the speakers and the amp are water-resistant. That said, they aren't designed to get soaked, either.
Undoubtedly, all you road racers out there are thinking that this would be just great on your Pinarello or Colnago. Be aware, however, that the combined weight of the speaker box and the rack is 25 lb (11 kg). Your bike also needs to already have rack-mounting eyelets on its frame.
BikeBeatz is available in a variety of styles, all of which are priced at US$299. In the video below, you can watch and listen as a rider uses it to share their tastes in music with the no-doubt grateful residents of Chicago.