Dome Angled Connector For the qdc earphones with convex female socket, an outlet design with a certain angle can shorten the length of the ear hook and make it closer to the ears.
Wrapped Connector Applicable to the earphones like qdc, UE, UM* brand and others with the same connector. (*Distinguish positive and negative polarity)
2pin 0.78 Connector Applicable to the earphones with 2pin(D0.78) flat/notch female socket.
Expandable MMCX Connector Applicable to the earphones with MMCX connector, including some earphones from Sennheiser, SONY and other brands.