4 pin balanced signal female plug. Apply silver-plated single crystal copper as conductor. 

Internal contact joint structure design. Dramatically improve the appeal of the HIFI. Covered with high-quality insulators.  

Avoid contact impedance and make the loss of media to a very low level. High-quality brass shell plus black fine sandblasting treatment. 

Matte texture. The high quality damping protection and anti-jamming function makes the audio signal more accurate and stable. 

Nearly lossless in transmission.