Audio-Technica ATH-S220BTBK Wireless Over-Ear Headphones Black

Audio-Technica ATH-S220BTBK Wireless Over-Ear Headphones Black Type: Headphone Driver Unit: 40mm Frequency Response: 5Hz-32KHz Input Impedance: 32 ohms Wireless Type: Bluetooth Battery: DC 3.7 V Lithium Polymer battery Operating Time: Approx. 60 hours continuous use (music playback) Distance: Line of sight - approx. 10 m (33')