Foldable and more lighter weight than other neckband headphones in the market, more flexible and convenient to carry in your bag or pocket. It can provide wonderful handsfree experience, sweatproof, great for outdoor sports exercise and indoor entertainment. Support volume adjustment, hands-free answer/hang up, quick switch music/pause/play. 9-12hours talk and music playing time, 120 hours standby time, you can use it for all day work