Sound One is an authentic premium sports brand offering innovative designs that inspire an active lifestyle. We enhance the athletic experience, inspiring you to be active and empowering you to improve your life. Changing the game is about challenging everything we know and accept about the products we design. Sound One S501 rewrites the rules of Bluetooth headphones audio, delivering a sound you’ve never heard before with premium sound and warm bass. Outperforms most wired headphones. Use your music device anywhere on your body without traditional limitations. You can even put your phone/music device in a bag at the gym and workout without the signal droping. Sound One S501 are the smallest Bluetooth headphones available, yet they pack an incredible 8 hours of play time. Enjoy a full day of music and calls or work out an hour a day for an entire week on a single charge. Fits over or under ear. Sound One S501 has the ability to lift the cord off your neck for a liberating workout experience. Sound One S501 allows for the headphones to be used either in the traditional under-ear wearing style for music and calls or over-ear, designed for those wanting a great sports music experience.