The X-1 Surge Contact Waterproof Headset allows you to playback audio from your portable music player as well as take calls from your smartphone while working out or swimming. It is waterproof in up to 12 feet of water and can withstand heavy perspiration from working out. The headset features a waterproof in-line microphone with a one-touch answer/end call button and is compatible with iOS, Android, and Blackberry devices. The silk-reinforced cable is designed for durability and the prevention of kinks and bends. X-1 includes five pairs of sound isolating earplugs to provide you with a comfortable fit while in use.