Skullcandy Rail Wireless Earbuds, Bluetooth Headphones, Noise Isolating Fit, Up to 42 Hours Battery, IP55 Sweat and Water Resistant, Microphone for iPhone Android - Bone: From the manufacturerRAILUPGRADABLE TECH, UNBEATABLE SOUND.WE CREATED RAIL WITH A SIMPLE SET OF DESIGN REQUIREMENTS — IT HAD TO BE THE BEST-SOUNDING, BEST-LOOKING, MOST COMFORTABLE, MOST INTELLIGENT EARBUD EVER MADE, MISSION ACCOMPLISHED.MISSION ACCOMPLISHED.Introducing Rail, our new flagship fami