The USB-C to RJ9 adapter is essential for connecting traditional telephone handsets or headsets to laptops, desktop computers, and mobile devices. This versatile adapter cable enables seamless integration of legacy equipment with contemporary technology. The plug-and-play functionality on Windows, macOS, Android, iOS, and iPadOS supports using professional-grade telephone headsets with PCs, Macs, and even smartphones, providing a cost-effective solution for businesses and individual users. Compatible with Sennheiser/EPOS UI760 Headset Amplifier and Plantronics/Poly Vista M22 Phone Amplifier on popular communication VoIP platforms. This cable dongle is ideal for those transitioning from landline systems to softphone applications or for users who prefer the comfort and reliability of their existing telephone hardware. The 6ft (1.8m) long cable enables flexible routing around a workstation, minimizing clutter and maintaining a neat setup.