Beautiful bullet-shaped earbuds with 2 detacheable & interchangeable MMCX Audio cables (Line-in and Bluetooth cables) and extraodinary sound quality with powerful   9.2mm Speaker Drivers. Super lightweight and so comfortable that they can be worn for hours and hours – you may even forget that you are wearing them. Byrd’s silicone eartips enhance the performance in-ear earphones by ensuring superior noise isolation, and a superb fit. The WaterSafe nano coating technology ensures that it’s sweatproof. Making Byrd earphones perfect for the gym, running, biking, hiking, exercising, and any other activity.