Airline adaptor jack. Allows Etymotic Earphones and Headset + Earphones to work with airline in flight entertainment systems.
Compatible With:
ER4 series
hf series
mc series
ETY-Kids
er6i
Models:
ER4
hf2
hf3
hf5
mc2
mc3
mc5
Ety-Kids3
Ety-Kids5
6i
mk5 Isolator Earphones
