Compatible withJBL Tune 600 (T600BTNC 600BTNC), 660 (T660NC 660NC), and 670 (T670NC 670NC) headphones. Buyers should verify their headphone model prior to purchase. EASY INSTALLINGFirst, detach the original ear pad. To do so, use the included triangular guitar pick to gently pry it open. Fitting the new ear pads takes only a few minutes. Package Includes1 piece headstrap pad + 2 pieces ear pads (headphones not included)