Ergonomic Structure for Wearable Pleasure: Built with craftsmanship and equipped with three different sizes of ear hooks and tips to guarantee a comfortable and secure fit even during work-outs for most people AptX Enabled, High Quality Audio: Streams amazing sound with aptX high fidelity stereo to provide your ears with an audio feast Inserted Magnets, Stay Organized: Magnetic backs of the earphones allow them to stay around your neck like a necklace to prevent dangling or loss when you are momentarily not using them Large Capacity, Long-Lasting Joy: A quick charge of 2 hours fills up the battery, offering 9 hours' worth of power to save you the trouble of having to charge them constantly Waterproof Design, Increased Mobility: Feel free to sweat or jog in the light rain thanks to its IPX6 splash proof rated material.