Hear less noise and more music. Active Noise Cancelling (ANC) technology blocks up to 90% of outside noise so you can truly enjoy your music. Complementary passive noise cancelling design further blocks ambient sound. Ultra-light, in-ear design with comfortable silicone ear tips. Includes 3 sizes of eartips (S, M, L). Inline mic lets you make or take phone calls. 1 AAA battery required for ANC (included). 48" cord length. Includes travel pouch and dual plane adapter. Brookstone box included