【BOSE A20 (with case, plugs, and kneeboard)】 BOSE A20 Aviation Headset with Bluetooth Dual Plug I'm selling this because I've upgraded. Purchased from the BOSE official website in 2021. Used for approximately 250 hours. Last used about two months ago. Used in C172, SR20, SR22, and G58 aircraft. There is some damage to the ear pads, but there are no problems with use. It has been confirmed to be in good working order by a certain買取業者 (buying and selling company) (as of October 15, 2025). As an added bonus, I'm including a kneeboard. It's a great deal, as it retails for around 10,000 yen. I'm also open to price negotiations, so please contact me. Please consider this opportunity. Thank you very much!! 【High-Quality Sound】 BOSE's Aviation Headset features clear sound quality and excellent noise-canceling capabilities. It's especially ideal for use in aircraft. 【Convenient Control Unit】 The included control unit is equipped with 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. It's 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... Noise Canceling We do not accept returns or refunds after purchase, as this may cause trouble. Thank you for your understanding.