Headset, headphone, earphone, inflight headset, black, 3.5mm single pin / dual pins / foldable pins, impedance 32ohms or 300ohm Inflight ... , inflight headset, earclip:1. black or other color customerized;2. 3.5mm single pin, 3.5 dual pins, 3.5mm dual pins ... or 300ohms.5. Rohs standard as per customer requirement. Headset (2)