- Brand: BOSE - Accessories: Charging cable, ear tips - Model: Wireless earbuds - Color: Black - Shape: With charging case Thank you for viewing. These are the QuietComfort Ultra Earbuds (2nd generation). Regarding usage time and condition, I purchased them this summer on Amazon for comparison testing with other models. I used them for about half a month for comparison testing in various situations (however, I did not take them outdoors in the rain or to leisure activities. The main testing was done using public transportation). There are almost no scratches, and both the case and the earbuds themselves are in good condition. The operation was also problem-free when connected to a smartphone (S25). As a result, the bass was too strong for me, and they didn't suit me, so I am selling them. I think the sound quality will appeal to those who like a "scooped" sound signature. The used ear tips were cleaned and disinfected with anhydrous ethanol. Also, as a bonus, I will include unused AZLA SednaEarfit Crystal for BOSE Earbuds (various sizes). These were opened for product photography. They are a product that costs around 3000 yen on Amazon. They have not been used in a smoking or pet environment. I generally do not create exclusive listings. Shipping will be from Hiroshima Prefecture.