Feature Item Name : Replacement Bose QC35 QC35II microphone Material : PVC + OFC Jack : 3.5mm gold-plated connector Mute Function : Support Volume Control : Not available Packing : 1* Bose QC35 QC35II headphone extension cord Made of selected PVC and OFC, the service life of headphone cord is long OFC has good performance of anti-interference, make sure audio signal transmission doesn’t loss and disturb Gold-plated connector is resistant to corrosion, not easy to rust Nose-reduction microphone intelligently pick up your voice, and suppress noise Mic function upgrades your music headphone to gaming headset, one headphone, two function Inline mute function make you freely open or close background sounds Perfectly compatible with Bose QuiteComfort QC35 QC35II headphones, and other devices with 3.5mm port