Sony's smallest and lightest wireless high-resolution noise cancelling earbuds. With the new firmware update, which will be available on November 17, 2022, a multipoint connection is now also possible. For absolute comfort, the Bluetooth headphones can be paired with two Bluetooth devices at the same time. When a call is received, the headset knows which device is ringing and connects to it automatically. These Sony headphones give you the best of both worlds: natural ambient sound when you want to interact with the world around you and high-quality noise reduction when you want to concentrate. Enjoy high-resolution wireless sound and crystal clear phone calls with this Bluetooth headset. Smart features allow for an effortless listening experience. Speak-to-Chat automatically stops music when you start a conversation, or the headphones also feature intuitive touch controls. Up to 20 hours of battery life with the charging case, IPX4 protection against splashing water from all sides. * As of March 30, 2022. According to a study conducted by Sony Corporation, measured according to Strategy Analytics guidelines, in a truly wireless style, compatible with the LDAC headphone market and compatible with the LDAC headset market. LDAC is a codec certified by Hi-Res Audio Wireless. Note For better charging, make sure that the headset is securely placed in the charging case and that it should only be charged using the included USB Type-C cable and that it is firmly connected to the charging case.