【BOSE A20 (with case, plugs, and kneeboard)】 BOSE A20 Aviation Headset with Bluetooth Dual Plug I'm selling this because I upgraded. Purchased from the BOSE official website in 2021. Used for approximately 250 hours. Last used about two months ago. Used with C172, SR20, SR22, and G58 aircraft. There is some damage to the ear pads, but there are no issues with use. Functionality has been confirmed by a certain買取業者 (buying and selling company) (as of October 15, 2025). Although not specifically listed as an included item, I will include a kneeboard. It retails for around 10,000 yen, so I think it's a good deal. I am also open to price negotiations, so please contact me. Please consider this opportunity. Thank you very much!! 【High-Quality Sound】 BOSE Aviation Headsets feature clear sound quality and excellent noise-canceling capabilities. They are especially well-suited for use in aircraft. 【Convenient Control Unit】 The included control unit has volume adjustment and mute functions, providing a comfortable user experience. It also has Bluetooth functionality, allowing for wireless connection. 【Convenient to Carry】 A dedicated case is included, making it easy to carry. Convenient for travel and business trips. - Brand: BOSE - Model: Aviation Headset - Accessories: Control Unit - Connection Type: Wired - Bluetooth Function: Yes - Volume Adjustment: Independent left and right adjustment - Mute Function: Yes Thank you for viewing. Other Features: Noise Canceling The box is not included. Everything in the photos is included. Returns and refunds after purchase are not accepted as they may cause trouble, so please understand.