Whether you want to relax on the noisy journey home from work or unwind with your favourite albums after a long week, you'll love using the Sony WH-1000XM4 Wireless Bluetooth Noise-Cancelling Headphones. Adaptive noise-cancelling filters out background noise so you can focus on your music or podcast. And with Adaptive Sound Control, the Sony WH1000XM4 Headphones intelligently adapts to your environment to deliver the best possible noise-cancelling experience. The Sony 1000XM4 Headphones let you hear those mp3 tunes like you've never heard them before. While mp3 compresses the original audio file, compromising quality, Sony's innovative DSEE HX technology upscales your files, so you can hear every glorious element of the mix, just as the artist intended. Sony's LDAC audio coding technology transfers three times more data than standard Bluetooth audio, making everything from the vocals to the percussion sound crisp, punchy, and clear. And even when you're not using your headphones wirelessly, the handy detachable cable will also play high-resolution audio, giving you consistent quality. For those times when you've got your hands full, Speak-to-Chat pauses your music when you start a conversation to let ambient noise in, so you don't need to remove your headphones to talk. They are also smart enough to pause your music or power off when you're not wearing them to help save the battery.