I am very cynical about Bluetooth audio these days. Even if the sound is good, the battery life sucks, the buds themselves aren't comfortable, and so on. However, I think I finally found a product that actually meets a lot of the criteria that make a good pair of Bluetooth earphones. Optoma's NuForce BE2 is made for athletes; it packs an IPX5 rating, decent sound, and a nice 10-hour battery life span all for $50.Read MoreOptoma NuForce BE2 review: The best Bluetooth earphones in this price range was written by the awesome team at Android Police.