2.5mm to 3.5mm Headphones Cable/Airline Adapter For Bose-QuietComfort35 QC35 | eBay
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Airplane Airline Flight Adapter | Bluetooth Airplane Adapter Bose - Bluetooth 5.0 - Aliexpress
Bose Single 1/8" Stereo Female to Single/Dual 1/8" Mono 40399
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Amazon.com: QC15 Airplane Headphone Adapter Compatible with Bose 700 QuietComfort 2 QC3 QC45 QC35 QC35ii QC15 QC25 QC20 NC700 SoundLink SoundLinkII AE2 AE2i AE2W and More Headphones, Golden Plated 3.5mm Jack : Electronics