Sony Extra Bass Wireless In-Ear Headphone MDR-XB70BT

DRIVER UNIT: 12mm (Dome Type) DYNAMIC TYPE: Closed Dynamic MAGNET: Neodymium FREQUENCY RESPONSE: 4 Hz-24,000 Hz VOLUME CONTROL USAGE TIME: Max. 9h CHARGE TIME: Approx. 2.5 Hours WEARING STYLE: In-ear Clip USB Cable Hybrid silicone rubber earbuds (SS, S, M, L x 2)