1.Open Ear and Ultimate Comfort - Open-ear and ergonomic design, 25g ultra lightweight, let earphones unrivalled comfortable and hardly noticeable, perfect for users who need long time listening or calling. No ear canal fatigue or hearing damage risk like in-ear earbuds. No bulky burden like over-ear headphones. 2.Wired Running Headphones - Snug fit and stay put in your ears throughout workout. The sport headphones can meet the most requirements from runners, including comfortable and secure fit, ambient awareness, lossless sound, help you enjoy music, podcast and audiobooks better in running and other sports. 3.3.5MM/Type-C Interface Wired Headset: Plug and play, no need to charge. Compatible with most devices, like smartphones, tablets, PC, notebook, etc. 4.Secure & Stable Fit - With ear-hook and neckband design, this open ear headphones can always keep its place & comfort without dropping off like wireless earbuds, no matter your ears are small or big, you are shaking heads or chewing, even for strenuous exercise like running, cycling, workout, playing tennis.