Sony’s lightest Wireless Noise-canceling headband ever. Take noise canceling to the next level with Sony’s Integrated Processor V1, so you can fully immerse yourself in the music. Super comfortable and lightweight design. Adjustable Ambient Sound mode and Adaptive Sound control features tailors sound to suit the environment around you Up to 35-hour battery life with quick charging (3 min charge for up to 1 hour of playback). High sound quality and well-balanced sound tuning. Crystal clear hands-free calling and voice assistant with Precise Voice Pickup technology. Multipoint connection allows you to quickly switch between two devices at once. Boost the quality of compressed music files and enjoy streaming music with high quality sound through DSEE. Alexa enabled for voice access to music, information, and more. Activate with a simple touch.