Sony WH-1000XM4 Wireless Noise Canceling Overhead Headphones

Sony WH-1000XM4 Wireless Noise Canceling Overhead Headphones Industry-leading noise canceling with Dual Noise Sensor technology Next-level music with Edge-AI, co-developed with Sony Music Studios Tokyo Up to 30-hour battery life with quick charging (10 min charge for 5 hours of playback) Touch Sensor controls to pause/play/skip tracks, control volume, activate your voice assistant, and answer phone calls Speak-to-chat technology automatically reduces volume during conversations Superior call quality with precise voice pickup Wearing detection pauses playback when headphones are removed   Specification: DRIVER UNIT: 40mm, dome type (CCAW Voice coil) BLUETOOTH® VERSION: Version 5.0 EFFECTIVE RANGE: Line of sight approx.30ft (10m) DSEE EXTREME: Yes FREQUENCY RESPONSE: 4Hz-40,000Hz FREQUENCY RESPONSE(BLUETOOTH® COMMUNICATION): 20Hz – 20,000Hz (44.1kHz Sampling) / 20Hz – 40,000Hz (LDAC 96kHz Sampling, 990kbps) FREQUENCY RESPONSE (ACTIVE OPERATION): 4Hz-40,000Hz PASSIVE OPERATION: Yes NFC: Yes CORD LENGTH: Headphone cable (approx. 1.2m, OFC strands, gold-plated stereo mini plug) 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. 200 hours(NC OFF) NOISE CANCELING ON/OFF SWITCH: Yes PERSONAL NC OPTIMIZER: Yes VOLUME CONTROL: Touch Sensor CABLE LENGTH: Approx. 1.2m BATTERY CHARGE TIME: Approx. 3 Hours (Full charge)