Sony's smallest and lightest wireless, noise-canceling Hi-Res headphones. With the new firmware update, which will be made available on November 17, 2022, a multipoint connection is now also possible. For absolute convenience, the Bluetooth headphones can be paired with two Bluetooth devices at the same time. When a call is received, the headphones know which of the devices is ringing and automatically connects to it. These Sony headphones give you the best of both worlds of natural ambient sound when you want to interact with the world around you and high-quality noise-canceling when you want to focus. Smart features make for an effortless listening experience. Speak-to-chat automatically stops the music when you start a conversation, or the earbuds also have intuitive touch controls. Up to 20 hours battery life with charging case IPX4 protection against splashing water from all sides. As of March 30, 2022, according to research by Sony Corporation, measured using Strategy Analytics guidelines in a truly wireless style that supports noise cancellation and is compatible with the LDAC headphone market. LDAC is a certified codec from “Hi-Res Audio Wireless.” Make sure that the Bluetooth device is turned on and that the Bluetooth function is turned on.