Thank you for viewing. This is an authentic product. The item is as follows: https://www.kashimura.com/goods/keitai/bluetooth/bl139.html https://store.shopping.yahoo.co.jp/pc-akindo/bl-139.html I have only connected it to test its functionality. As a bonus, I will include a new dual-port charging cable. Please refer to the photos for details. I am open to price negotiations for those considering a purchase, so please feel free to comment. Cancellations after a successful bid are not accepted. Bids from new users or those who cannot be contacted after a successful bid may be deleted. Please feel free to ask any questions. Thank you for your consideration. #kashimura