TRI HIFI HEADPHONE ADAPTER: TRI HIFI Audio Headphone Adapter with Stereo Gold-plated and Silver Copper Crystal Balanced Internal Earphone IEM Plug. The outer part is made of Aluminum alloy.

GOLD PLATED PLUG: High Density protective layer to shield against electromagnetic interference Secure connection for a maximum high-fidelity sound

OCC COPER INTERNAL WIRE: employs high quality OCC copper wire for internal connections, along with imported silver alloy solder for exquisite sound quality

3.5MM/4.4MM BALANCED TO 2.5 BALANCED PLUG: This plug is 3.5MM/4.4MM balanced male to 2.5mm balanced female. It will work for 3.5mm/4.4mm jack equipment, connect 3.5mm/4.4mm Male to 2.5mm Female, allows you connect headphones to audio devices.