HeadphoneMate is proud to present WIRELESS BLUETOOTH 5.0 ADAPTER for Bose QC 25 headphones. HeadphoneMate products are carefully designed manufactured branded and packaged. HeadphoneMate worked with audio technician closely to design this wireless Bluetooth adapter to ensure high performance. All HeadphoneMate products are covered with 100% satisfication guarantee! Not happy with the purchase? Simply send them back for full refund no questions asked!^ PLEASE NOTE: this adapter is for Bose QC25 only it does NOT fit any other model of headphones.