KBEAR ST12 2pin 4.4mm (Black/Blue) KBEAR ST12 QDC 4.4mm (Silver) 8-core silver-plated oxygen-free copper cable Purchased on Amazon recently. Total usage time: about 3-4 hours each. Selling due to equipment reorganization. The seller is a non-smoker. Please check the sales site for details and reviews. Additionally, I will include a pair of TRI Horn M size ear tips. Also, if you wish, I can change the shipping method to one that allows for pick-up at a convenience store or post office. Amazon reference price at the time of listing (per unit): 1899 yen This product may be listed on other sites, so in the unlikely event that it sells out, I apologize, but I will have to cancel the order. Thank you for your understanding.