激しく動いても外れないBluetoothイヤホン(動画) - WIRED.jp
http://news.google.com/news/url?sa=t&fd=R&usg=AFQjCNE2ruj6EAF_E3lUN-jmoz3VR_lTtw&url=http://wired.jp/2011/09/29/%25E6%25BF%2580%25E3%2581%2597%25E3%2581%258F%25E5%258B%2595%25E3%2581%2584%25E3%2581%25A6%25E3%2582%2582%25E5%25A4%2596%25E3%2582%258C%25E3%2581%25AA%25E3%2581%2584bluetooth%25E3%2582%25A4%25E3%2583%25A4%25E3%2583%259B%25E3%2583%25B3%25EF%25BC%2588%25E5%258B%2595%25E7%2594%25BB%25EF%25BC%2589/
イヤホンは消耗品なので高い高機能のは買わない方がいい