Monster Authorized Dealer, 1 Year USA Warranty BUILDING ON THE LEGEND: Monster launched the iSport Freedom in 2013 as the world's first sport-specific on ear headphone. Now, the revised and re-booted version brings cutting edge technology and a sleek new design to the flagship in the iSport line up. PURE MONSTER SOUND: Music is proven to increase athletic performance by up to 15%, whether it's your first trip to the gym or you're a seasoned athlete. Monster's signature ingredient for iSport delivers crystal clear details, with pumping bass to keep you motivated through your training.

♬ BONE CONDUCTION TECHNOLOGY: Bone conduction headphone works by creating mini vibrations, sending sound through the cheekbones directly to the inner ears; The aim to help people with Recession Type Hearing Impairment to listen music also helps to avoid hearing loss from ordinary earphones. ♬ HD STEREO SOUND: This new smart bone conduction headphset delivers dynamic sound and truly powerful bass, it can achieve clear sound reduction in a noisy environment, so as to release the ears, you can enjoy heavy bass and crystal clear treble whilst listening to your favorite music. ♬ COMFORTABLE WEARING EXPERIENCE: Open-ear designed are made to ensure that the user does not plug or cover their ears, to avoiding wearing discomfort that in-ear or over-ear headsets will bring; A tension band is attached to adjust headphones to fit for different head circumference; Wireless desiged for No Trouble with wire tangles.