▁to ▁activ ate ▁the ▁Google ▁Ass istant , ▁making ▁it ▁the ▁first ▁head ph ones ▁to ▁integrate ▁with ▁the ▁service . ▁ ▁The ▁Q C 3 5 ▁II ▁was ▁review ed ▁fav ou rab ly ▁for ▁their ▁noise ▁can cellation , ▁audio ▁quality ▁and ▁comfort . ▁ ▁In ▁July ▁ 2 0 1 9 , ▁users ▁began ▁to ▁report ▁that ▁a ▁firm ware ▁update ▁to ▁the ▁Q C 3 5 ▁II ▁had ▁in hib ited ▁the ▁performance ▁of ▁the ▁noise ▁can cellation ▁features . ▁B ose ▁stated ▁that ▁it ▁had ▁not ▁made ▁any ▁changes ▁to ▁noise ▁can cellation ▁functions ▁in ▁their ▁firm ware . ▁Some ▁users ▁performed ▁firm ware ▁down gr ades ▁to ▁the ▁to ▁revert ▁back ▁to ▁an ▁earlier ▁version , ▁but ▁B ose ▁later ▁prevent ed ▁this ▁for ▁security ▁reasons . ▁In ▁October ▁ 2 0 1 9 , ▁as ▁part ▁of ▁an ▁investigation , ▁B ose ▁began ▁to ▁allow ▁own ers ▁within ▁a ▁" reason able " ▁proxim ity ▁to ▁the ▁company ' s ▁headquarters ▁in ▁F ram ingham , ▁Massachusetts ▁to ▁request ▁a ▁visit ▁by ▁a ▁techn ician . ▁ ▁No ise ▁Can cell ing ▁Head ph ones ▁ 7 0 0 ▁In ▁ 2 0 1 9 , ▁B ose ▁released ▁the ▁No ise ▁Can cell ing ▁Head ph ones ▁ 7 0 0 , ▁a ▁new ▁high - end ▁product ▁position ed ▁above ▁the ▁Q C ▁ 3 5 . ▁ ▁It ▁features ▁a ▁more ▁contemporary ▁design ▁with ▁a ▁st ain less ▁steel ▁band , ▁and ▁are