Wave Audio ISO Elite Active Noise Cancelling earbuds take listening experiences to the next level. These earbuds are essential to any power users that demand high-end performance all day, every day. Three modes of operation allow complete sound isolation from the outside world when uninterrupted listening is needed, full sound transparency on your surroundings when listening is critical & Bluetooth mode for easy listening or extended play. Three unique onboard microphones that feature feed-forward and feed-back technology provide crystal clear sound pick-up on calls, all while cutting out unwanted noise.