Product Description: Intelligent and intuitive, the WH-1000XM4 headphones offer further improvements to our industry-leading noise cancelation, exceptional sound quality, and smart listening that adjusts to your behavior and your location. HD Noise Canceling Processor QN1, Bluetooth Audio SoC and a dual noise sensor let you listen without distractions. - Personal Noise Canceling Optimizer and Atmospheric Pressure Optimizing - High-quality audio with DSEE Extreme™ and LDAC - Adaptive Sound Control automatically adjusts ambient sound settings to suit your location and behavior - Wireless freedom with BLUETOOTH® technology DRIVER UNIT 40 mm, dome type (CCAW Voice coil) DSEE EXTREME Yes FREQUENCY RESPONSE 4 Hz-40,000 Hz FREQUENCY RESPONSE (BLUETOOTH® COMMUNICATION) 20 Hz–20,000 Hz (44.1 kHz Sampling)/20 Hz–40,000 Hz (LDAC 96 kHz Sampling, 990 kbps) FREQUENCY RESPONSE (ACTIVE OPERATION) 4 Hz-40,000 Hz PASSIVE OPERATION Yes NFC Yes CORD LENGTH Headphone cable (approx. 1.2 m, OFC strands, gold-plated stereo mini plug)