Bluetooth� Wireless Technology, Skullcandy Cassette 22 hour battery life and rapid charge, Up to 22 Hours of Battery + Rapid Charge, Skullcandy Cassette has a durable band, Durable Metal HeadbandSkullcandy Cassette collapsable design, Collapsible Design, Skullcandy Cassette microphone and track controls, Microphone, Call, Track and Volume Control - Tech Specs: Headphone Type: ,Bluetooth� On-Ear ,Connection Type: Bluetooth� 5.0,Impedance: 30 Ohms �15%, Driver Diameter: 40mm, THD: <3% @1khz, Sound Pressure Level: 120-126dB, Frequency Response: 20Hz - 20KHz, Weight: 147g