Wireless: This headphone works with Bluetooth-compatible V5.1 technology, which ensures a clear sound and stable connection.Folding: This headset is easy to store and carry because it is foldable, it will not occupy so much space in your bag.Noise-cancelling: This earphone provides you with clear sound when calling, making your life and work more convenient.Rechargeable: There is a built-in 400mAh battery in the headphone, it can be used for a long time after fully charged.Hands-free: This over-ear headset is comfortable to wear, freeing your hands for running, working, studying, etc.Specification:Product model: MS-B2Bluetooth version: V5.1Backward distance: 15M (no interference)Interface: Type-CCall duration: about 12 hoursMusic usage time: about 14 hoursSpeaker: 32 /40mmHeadphone battery capacity: 400mAhSize197*185*76mmProduct color: titanium Black/Silver white/beige/navy Blue/coral Red/mint greenPackage Included1PC