I purchased this item new from Sanwa Direct on September 5, 2025. The purchase price was 11,800 yen (see the receipt in the photo). I unboxed it, and it wasn't quite what I was looking for, so I haven't used it. I cannot provide the receipt in the photo because it contains my address. I am including a photo of the serial number to prevent any replacement scams. Thank you for your understanding. This is a completely wireless headset with Bluetooth 5.0 and a 10m wireless range. - Bluetooth: 5.0 - Communication Range: 10m - Maximum Continuous Playback Time: Approximately 5 hours - Color: Black - Model Number: 400-BTWS48K