However, most car manufacturers are now realizing that people don’t buy cassettes or even music CD’s like they used to. Due to most music being available in mp3 formats downloadable from many music retail and peer sites, most people now purchase, share and listen to music on mp3 players similar to and including the BlackBerry media device. Because of this trend, car manufacturers have made listening to music much more enjoyable by allowing you to play your blackberry mp3s on car stereo speakers by providing special jacks to plug adapters for these devices into. Depending on your BlackBerry device, you may need a 2.5 or a 3.5 adapter, both of which are sold regularly at electronic chains like Radio Shack or Best Buy and can even be found at local Wal-Mart department stores.