While it can be nice to listen to motivating music while riding your bike, riding on the streets while wearing earbuds is ... well, crazy. In many places, it’s also illegal. One option is to wear non-sealing earHero earphones, which are claimed to allow both outside noise and music into the user’s ear canal. Another, however, is to attach some Otus Mini-Speakers to your helmet.
Read the full article: Mini-speakers for bike helmets let riders hear more than just their music