High-quality Material: Made of enameled copper soft and durable PVC covers. Robust metal shell provides solid protection making it wear-resistant and anti-corrosion and ensuring high stability sound transmission. Dual Functions: The 3.5mm to USB jack audio adapter is ideal for connecting 4-pole CTIA 3.5mm headphones microphones or speakers to a PC via a USB interface. Plug and Play: The system automatically recognizes the USB transfer to the 3.5 mm port within seconds. No need to download driver USB bus-powered no need for external power. Multi-function Headset Adapter: Support stereo sound listening and speaking easy to connect a 3.5mm port to your devices. Wide Compatibility: Compatible with CTIA and Android OMTP standard 3.5 mm TRRS Jack headphones. Windows 108187vista XP Linux etc.