· This Certified Refurbished product is manufacturer refurbished, shows limited or no wear, and includes all original accessories plus a 90-day limited hardware warranty.· Press the ULT button to boost your bass & feel the incredible power of sound.· Quality noise canceling with dual noise sensor technology & V1 processor.· Unique thermo-foaming design for smooth cushions that comfortably mold to your ears.· Swivel fold design and compact carry case for portable packing.