Audio-Technica ATH-CKS30TW BL Wireless Earphones Bluetooth [Truly Wireless Earphones / Deep Bass / IP55 Waterproof and Dustproof Standard / Multipoint Compatible / Small and Lightweight / Up to Approximately 20 Hours of Playback / App Compatible / Hear-through / Low Latency Mode] ATH-CKS30TW BL Blue Purchased new and used less than 10 times for web conferences, etc. Before listing, I tested the connection with my iPhone and confirmed that both ears can hear without any problems. Currently sold new on Amazon for around 10,000 yen. I purchased it during a sale, so I got it for about 8,000 yen. As this is a used item from a private seller, Please understand that we cannot offer warranties or returns after purchase. To send it with the box, it will be sent via courier, so the price is set considering the shipping cost. If you don't need the box and are okay with postal delivery, I will send only the main unit and accessories with simple packaging. In that case, the shipping cost will be about 400 yen less, so a discount is possible. Please consult before purchasing.