Black bone conduction headphones, AEROPEX. Includes charging cable, operation confirmed. - Color: Black - Accessories: Charging cable, sports belt - Design: Bone conduction design - Shape: Neckband type Please check the condition of the product in the images. 【Reason for being a "defective item"】 1. There is a slight rattling sound from the left speaker. This is a common issue with this model, and it's likely that an internal part has shifted. However, the rattling sound is almost non-existent when worn and in motion. 2. The silicone cover on the left side is slightly lifted and detached. 3. The base of the neckband on the left side is broken, but the wiring is connected, so sound is still produced. Due to this, I subjectively feel that the left side is slightly less tight, and the sound seems a little quieter compared to the right side. You can use it without any problems for listening to music. It doesn't fall off while wearing it, so it functions as an earphone, but I'm selling it as a defective item at a reduced price. Series...Aeropex