The smallest wireless noise-canceling headband ever made by Sony. Sony's Integrated Processor V1 takes noise cancellation to the next level so you can enjoy the music to the fullest. incredibly light and comfortable design. Adaptive sound control features and an adjustable ambient sound mode adjust sound to fit your surroundings. With rapid charging (3 minutes for up to 1 hour of playback), the battery can last up to 35 hours. Excellent sound quality and balanced tuning. Voice assistant and crystal-clear hands-free calling with Precise Voice Pickup technology. You can quickly switch between two devices at once with a multipoint connection. Improve the quality of compressed music files and use DSEE to stream music with crystal-clear audio. Voice access to music, information, and more is made possible by Alexa.