Disassemble the noise cancelation box on Bose QuietComfort 20? - In-Ear Headphone - iFixit
15.50] Professional Dr. BOSE QC20 QC20i Headphone Maintenance Service Contact Bad Replacement Unit Plug Noise Reduction System from best taobao agent ,taobao international,international ecommerce newbecca.com
REYTID USB Charging Cable Compatible with Bose QuietComfort 20 / QC20 & Soundlink Around-Ear Wireless Headphones - Replacement Battery Charger Lead | Reytid Online | TheMarket New Zealand