Noise cancellation, powered by HD Noise Cancelling Processor QN1 Sound quality - these Bluetooth headphones support ideal Resolution Audio, and even compressed music files are upscaled using evolved DSEE Extreme technology Speak-to-Chat automatically pauses playback when one start a conversation, Wearing Detection powers off headphones when not wearing them, plus more smart features for a seamless, hands-free listening experience With multipoint connection, Sony headphones can be paired with two Bluetooth devices at the same time, Bluetooth version: 5.0 and frequency range: 2.4GHz band (2.4000GHz-2.4835GHz), Effective Range : Line of sight approx. 30ft (10m) Driver Unit : 40mm dome type (CCAW Voice coil), Plug : Gold-plated L-shaped stereo mini plug, Cord Length : Headphone cable (approx. 1.2m, OFC strands, gold-plated stereo mini plug) WH-1000XM4/B Only music, nothing else It’s just you and your music with the WH-1000XM4 headphones. The easy way to enjoy less noise and even purer sound, with smart listening technology that automatically personalizes your experience. Industry-leading noise cancellation* Wherever you are, the WH-1000XM4 headphones deliver our best ever noise-cancelling performance. The technology that makes it happen Dual sensors and the HD Noise Cancelling Processor QN1 cancel noise in real time. All-day power and quick charging A huge 30 hours of battery for all-day play, and 5 hours of power with just 10 minutes charging. Headphones that react to you The proximity sensor and two acceleration sensors detect the wearer and adjust the sound. For everyday convenience, just Speak-to-Chat As soon as you speak to a friend Speak-to-Chat stops the music so you can talk without distraction. Wireless freedom, premium sound LDAC transmits three times more data than conventional Bluetooth for super-high-resolution audio. Sound you can believe in A built-in analogue amplifier provides exceptionally low distortion and excellent sound quality. Real-time restoration of your compressed files Using Edge-AI, DSEE Extreme upscales compressed digital files in real time for a richer sound. Sony | Headphones Connect app Turn down the background volume to hear just voices, and adjust the equalizer to suit your taste. Automatically adjusts to whatever you do Adaptive Sound Control senses where you are and what you're doing and adjusts the sound to match. Control your sounds and manage your life Quick Attention Need to quickly hear sounds around you? Just place your hand over the housing to instantly turn the volume down and let ambient sound in. Voice Assistant Manage your day hands free with the voice assistant. Get information, set reminders and more. Clearer hands-free calling Speak more freely with easy, hands-free calling. Put down your phone and speak with a double tap. Control at