A USB-C to 3.5mm auxiliary audio cable connects modern USB-C smartphones, tablets, and laptops to headphones, car stereos, or speakers lacking a USB-C port. These cables often feature built-in Digital-to-Analog Converters (DAC) for high-fidelity audio, 24-bit/96kHz resolution, and durable, braided shielding, enabling seamless, plug-and-play music playback.