ER4XR Extended Response Earphone Type_Ear Plugs 39″ USB charging cable (Type

39″ USB charging cable (Type A USB on one end and Micro-B USB on other end)

The high NRR 32 noise blocking makes them ideal for sleeping

no itching or pressure pain

you can still keep talking to your workmate

ER4XR Extended Response Earphone Type_Ear Plugs 39″ USB charging cable (TypeER4XR is the highest performing single driver in ear monitor. The IEM shells are made of anodized aluminum, CNC machined with extremely tight tolerances. Using a single Balanced Armature (BA) driver allows for extremely accurate IEM without the added complexity of crossovers, and helps keep the aluminum body small and slim. The included high quality user replaceable cable is reinforced and twisted, to improve longevity and durability. Etymotic IEMs