This is the second-generation WAYFARER RW4012 smart glasses, a collaboration between Meta and Ray-Ban. This limited-edition model was not released in Japan and is limited to 7,500 units worldwide. It is currently sold out, making it very difficult to obtain in Japan. Since it is a new, unopened product, the serial number is unknown. It is printed on the inside of the charging case and on the temples. While it's not possible to request a specific serial number, I used ChatGPT to search, and as of now, serial number 1/7500 has not been confirmed. You might be lucky enough to get a great number! The lenses are photochromic, appearing clear indoors and transforming into ruby-tinted sunglasses when exposed to sunlight. The transparent frame adds a stylish touch, allowing you to see through it. RayBan Meta Gen2 (2nd Generation) Wayfarer 【Limited Edition】 Model Number: RW4012 Frame Color: Matte Transparent Lenses: Transitions Ruby (photochromic lenses that change color with UV light) Size: 50mm • 3K Ultra HD video recording • Up to 8 hours of continuous use (when fully charged) • Fast charging: 50% charge in 20 minutes • Additional +48 hours of use with the included charging case • App connectivity for recording, music playback, and calls Please refer to the official website for detailed product information in Japanese before purchasing. Please note that cancellations and returns are not accepted after purchase. If you have any other questions before purchasing, please feel free to ask in the comments.