Sony WH-1000XM4 Wireless Noise shops Cancelling Over the Ear Headphones

Product Name: Sony WH-1000XM4 Wireless Noise shops Cancelling Over the Ear Headphones
HEADPHONE TYPEClosed, dynamicDRIVER UNIT40 mm, dome type (CCAW Voice coil)MAGNETNeodymiumDIAPHRAGMAluminium-coated LCPFREQUENCY RESPONSE4 Hz-40,000 HzFREQUENCY RESPONSE (ACTIVE shops OPERATION)4 Hz-40,000 HzFREQUENCY RESPONSE (BLUETOOTH® COMMUNICATION)20 Hz–20,000 Hz (44.1 kHz Sampling)/20 Hz–40,000 Hz (LDAC 96 kHz Sampling, 990 kbps)SENSITIVITIES (DB/MW)105 dB/mW (1 kHz) (when connecting via the headphone cable with the unit turned on), 101 dB/mW (1 kHz) (when connecting via the headphone cable with the unit turned off) CORD TYPESingle-sided (detachable)CORD LENGTHHeadphone cable (approx. 1.2 m, OFC strands, gold-plated stereo mini plug)PLUGGold-plated L-shaped stereo mini plugWEARING STYLECircumauralNFCYesDSEE EXTREMEYesPASSIVE OPERATIONYes Battery BATTERY CHARGE TIMEApprox. 3 hours (Full charge)BATTERY CHARGE METHODUSB BATTERY LIFE(CONTINUOUS MUSIC PLAYBACK TIME WITH INTERNAL MEMORY)Max. 30 hours (NC ON), Max. 38 hours (NC OFF)BATTERY LIFE (WAITING TIME)Max. 30 hours (NC ON), Max. 20.