Two way radio Bone Conduction Earphone with special earbud and resistant noise design Two way radio Bone Conduction Earphone with special earbud design ,you shouldn't worry it will offIf you afraid the noise would annoy you,the ear vibration resistant noise design earphone is your best choose. Compatible with :For Kenwood : TK-208,220,240,240D,248,250,260,260G, 270 TK-270G,308,320,340,340D,348, ...