Thank you for viewing. This is a listing for the Bose QC20 QuietComfort 20 (compatible with iPhone/iPad/iPod). These are wired earphones equipped with high-performance active noise-canceling, recommended for those who want to enjoy music in peace and quiet. I mainly used them on airplanes and trains. They also have a microphone function, so I think they're suitable for things like FOS. I used them with a Bluetooth adapter (made by Xiaomi). Operation has been confirmed, and they work without any problems. The M-sized ear tips are included. I seem to have disposed of the L and S sizes, and I couldn't find them. Accessories and the case are as shown in the images. I will also include the Bluetooth adapter. This is a discontinued product, and I loved it for its excellent sound quality and noise cancellation, but I am selling it to declutter.