Active Noise Cancellation, Up to 22 Hours of Battery, Rapid Charge (10 min = 3 hrs), Built-in Tile� Finding Technology, Flat-Folding and Collapsible, Call, Track and Volume Control, Tech Specs, Headphone Type: Bluetooth� Over-Ear, Connection Type: Bluetooth� 5.0, Impedance: 32 Ohms �15%, Driver Diameter: 40mm, THD: <3%, Sound Pressure Level: 99.63 Frequency Response: 20Hz - 20KHz, Weight: 228g