Mucro ML233 Foldable Wired Sports Neckband Headphones1. Foldable headband and design, is not only for saving your desk space but for carrying in your bag or pocket, and more lighter weight than other neckband headphones in the market and more flexible. 2. Silicone earplugs, comforms to your ear. These are 3 sizes of earplugs to ensure a custom comfortable fit, sealing the ear to diver b and isolate noises. 3. Good sound : good call and microphone. Even on a noisy treadmill, you can clearly hear each other. 4. Built-in microphone, can answer / hang up calls and switch music 5. Suitable for all kinds of sports occasions, such as running, jogging, hiking, cycling, etc 6. 3.5mm headphone jack 7. Cable length: 120cm+/-3cm 8. Package list: - Mucro headphones x 1 - Earbuds x 3 pairs (S/M/L) - User Manual x 1