Neckband headphones in ear headphones series sony mdr xb type of fitting in ear transmission mode cordless features padded headband in line control microphone functions remote control function rechargeable sensitivity 112 dbmw impedance 100 ohm frequency response 4 26000 hz max power handling 100 mw driver 12 mm number of drivers 1 magnet type neodymium operating time 9 h talk time 9 h battery charging time 2 5 h colour black material