SONY WF-1000XM4 with 36 Hrs Playtime and Industry Leading Noise Cancellation Bluetooth Headset (Black, True Wireless). Everything in the WF-1000XM4 headphones has been redesigned. Our new Integrated Processor V1, specially developed by Sony, that cancels more noise than ever, a new driver with more performance, newly designed noise sensing microphones, & innovative Noise Isolation Earbud Tips with a more stable fit. Our new Integrated Processor V1 takes the noise canceling performance of our acclaimed QN1e chip and goes even further. Improved noise canceling performance and Bluetooth ?System on Chip? technology delivers the industry?s highest level of noise canceling yet uses less power.The Integrated Processor V1 also enhances sound quality and reduces distortion and enables LDAC code processing and DSEE Extreme. You can enjoy a full working day of charge ? 8 hours ? from your headphones and store another 16 hours in the case. No cables necessary ? the WF-1000XM4 features Qi technology for easy wireless charging. Sony | Headphones Connect? App for Android /iOS. A higher, clearer, and more stable Bluetooth signal strength than ever before.