?[Working Principle] It convert iOS format output digital audio signal to standard USB format digital signal, and transmit USB format digital signal to your type c device, your type c device decodes this usb digital signal to analog audio signal. Or convert USB format digital signal to iOS format digital signal, then transmit to iOS device, iOS device decodes digital signal to analog signal. Sound quality depends on your device.?[NOTE #1] This adapter does not work with the following devices: USB-C flash driver & card reader, USB-C hub. Can't sync data between laptop and iOS devices. And not support charging.?[NOTE #2] This adapter does not work with the following devices: USB-C flash driver & card reader, USB-C hub. Can't sync data between laptop and iOS devices. If the peripheral work current exceeds 500MA, iOS device will pop up a prompt of "Cannot Use Device" (iOS device auto protection enabled).?[Most Commonly Used in] Headphones Amplifiers, Wireless lavalier receivers(The USB-C interface of the device must support digital audio signal output).?[Strengthen Key Node] Designed for the harshest routines. Premium TPE & high elastic nylon built-in core wire, can withstand -50? will not become brittle. The premium nylon fabric and enough pure copper secures a 100% durable and efficient charging. The toughest industry tests is necessary:Bending Test > 15000+Salt Spray Test > 48 HoursHigh-Low temperature Test: -50? to +60?Plug & Unplug Test > 15000+