· This USB Type-C Auxiliary adapter allows you connect devices that use a 3.5mm audio plug to your USB-C devices.· This adapter also allows you to not only listen to audio, but to use your earphones for phone calls and volume control.· Quality at a Fair Price: Monoprice's rugged design and rigid quality control standards deliver high quality products at fair prices.· Service & Support : You're never on your own with Monoprice products! We have a full team of friendly and knowledgeable technicians available to answer your questions· Contact our technical support team for questions about our products, troubleshooting, or even suggestions for products to fit your particular needs.