【Conversion Cable for Using Earphones with Microphone on PC】 I bought a replacement because the cheap one I bought didn't work. This one works without any problems. As noted below, it's gold-plated. 【Earphone Microphone Conversion Cable】This cable connects earphones with a 3.5mm 4-pole mini-plug microphone to a PC with 3.5mm mini-plug x 2 (microphone input and earphone jack). (Not compatible with TRS and TS microphones / RODE microphones / condenser microphones) 【Excellent Compatibility】Compatible with PCs, earphones with microphones, and gaming headsets. Compatible with all PC applications (e.g., Skype, MSN Messenger, Yahoo, Google Voice, etc.). "Note: The microphone side is not compatible when connected to the microphone-equipped headphones of Challenge Touch, or the earphones included with Xperia/GALAXY/AKG/iOS smartphones." 【Durability and Flexibility】The cord has a wear-resistant braided outer layer and has passed over 10,000 bend tests, improving the lifespan by more than 3 times compared to ordinary conversion cables. The connection part of the connector is less likely to break. 【High-Quality Sound Reproduction and Stability】The 24K gold-plated connector ensures high-speed transmission of pure sound signals. In addition, the (internal) high-purity OFC (oxygen-free copper) inner core wire of the audio cable not only maximizes conductivity and durability but also avoids interference.