Bang & Olufsen wireless headphones Beoplay HX Black Anthracite Active Noise Cancelling Bluetooth Purchased at the Umeda store. This is the model worn by Ahyeon of BABYMONSTER. I used them a little, but I haven't been using them much lately, so I'm putting them up for sale. The price is under adjustment, so it might go up little by little. I bought them for around 80,000 yen. I think I bought them around May, so it hasn't been that long.