Silicon Devices Wireless Bluetooth Sports Headphones, Red Volcano are the latest generation design created to accompany you throughout every moment of the day with the latest Bluetooth 4.0 technology allowing you to listen to music from your cell phone from as far away as 30 ft. HD Crystal Clear Sound - Volcano around-ear earphones provide incomparable sound quality, approximating the human ear, with a rich, dynamic soundstage that accentuates every detail of your music. Receive phone calls at any moment with Volcano Headset - Receive or cancel incoming calls at the click of a button on the main control switch even during vigorous activities without necessitating handling the phone itself. Perfect fit for all sizes and ages - Silicon Devices thought about everyone and designed Volcano Red Sport Earphones to be comfortably used around-ears of any shape and size without sacrificing music quality. Made to be used with iPhone 6, 6 Plus 5 5c 5s 4, Android and most Bluetooth devices. Built for extreme activities - Volcano Workout Earphones are totally sweat proof and were developed to be used on all occasions, including running, during rigorous physical activities and impact sports.