The Monster iSport Achieve Bluetooth Headphones offers extreme high-performance with top-rated value, including all of Monster's patented features that make it the leader in the sports headphone arena, offering more high-activity models. The iSport Achieve In-Ear is a great choice for working out at the gym or for anyone on-the-go, with Monster's exclusive SecureFit technology, allowing you to move freely while the headphones stay put. High noise isolation lets you focus, and Achieve is completely sweat-proof, so you can work hard and listen loud with Monster Performance Sound. Five-plus hours of battery life mean you can go longer than you thought possible.