This product was purchased two years ago. I used it during my commute and workouts, but I'm selling it because I'm replacing it. ⚠︎ Regarding the stain on the right side As shown in the photos, there is a stain on the right side. This is a stain that occurred when I repaired the wingtip, which was coming off easily. The work didn't go well, and the adhesive stain is noticeable. The operation is good, and the battery life is also fine, but please refrain from purchasing if you are concerned about the stain. 【Main Features】 ・Active Noise Cancellation ・Transparency mode ・Apple H1 chip (Excellent compatibility with iPhone) ・Wingtip design that won't fall out during exercise For reference on product details, the manufacturer's information is listed below. Please refer to it. https://www.biccamera.com/bc/c/av/beats/beats_fit_pro.jsp