Headset, headphone, earphone, inflight headset, black, 3.5mm single pin / dual pins / foldable pins, impedance 32ohms or 300ohm Inflight Headset, ... headset, earclip:1. black or other color customerized;2. 3.5mm single pin, 3.5 dual pins, 3.5mm dual pins with ... one foldable pin;3. Speaker: 30mm diameter, or 40mm diameter;4. impedance 32ohms ...