About this item Sony’s lightest Wireless Noise-cancelling headband ever Up to 50-hour battery life with quick charging (3 min charge for up to 1 hour of playback) Multi-Point Connection helps to pair with two Bluetooth devices at the same time Take noise cancelling to the next level with Sony’s Integrated Processor V1,so you can fully immerse yourself in the music Super comfortable and lightweight design ( 192 Grams ) Adjustable Ambient Sound mode and Adaptive Sound control features tailors sound to suit the environment around you High sound quality and well-balanced sound tuning Crystal clear hands-free calling and voice assistant with Precise Voice Pickup technology