Bose Frames Alto are sunglasses that combine stylish design with high-quality sound. I purchased them and stored them after using them a few times. They are sunglasses with built-in speakers, convenient for today's world, and from the high-quality BOSE brand. This first ALTO model seems to have been popular. They function normally. - Model Name: Frames Alto - Size: S/M - Brand: Bose - Accessories: Case, charging cable, box Thank you for looking.