Sweat-proof lightweight design and secure TripleLock™ fit. Bluetooth® wireless with 6-hour rechargeable battery. Call, track and volume control via the in-line microphone and remote. MicroSport™ Bluetooth Doesn’t hang heavy around the neck or ears, instead, the Bluetooth functionality is built into a low profile and lightweight earbud that delivers 6 hours of your motivational soundtrack non-stop. TripleLock™ Tech Unlike any other wireless earbuds on the market, XTfree utilizes 3 proprietary technologies (FitFin™, StickyGels™, Fix®) to work together and stay locked in place. Scroll over the unique technologies above to see how they deliver our most secure and comfortable fit. Sweat Resistant It’s well known that sweat can slip through the cords and cracks of your gear, causing them to deteriorate the quality of your buds, or even stop working altogether. That’s why the XTfree earbuds are sonically welded shut, blocking out sweat, rain, or other types of moisture that would otherwise ruin your gear. Safety First No matter the activity, it’s important to stay safe. That’s why our proprietary ambient ear gels allow you to hear your music without completely blocking out your surroundings, keeping you aware of what’s going on around you whether you're training in the gym or outside. Pureclean™ Tech Don’t forget that the more you sweat, the more you stink. That’s why our impressive Pureclean™ Tech is blended into our comfortable silicone ear gels to keep your gear feeling and smelling fresh. OnBoard Mic/Remote + Volume Take calls and navigate your playlists on any Bluetooth enabled device with the easy-to-access microphone and remote just below the left earbud. Press the middle button once to answer/end calls or play/pause music.