Features: Effortlessly connects your CTIA/OMTP 3.5mm headphones or speakers to USB C devices with this plug and play adapter, enabling stereo sound and clear call functionality without driver or external power. Featuring a alloy construction and TRRS 4 poles interfaces, this external sound card adapter maintains stable signals transmission while adding a 3.5mm auxiliary port to modern USB C smartphones, tablets, and laptops. Designed for audiophiles, remote workers, and travelers who require sound connectivity between headphones/microphones and USB C equipped smartphones, tablets, or PCs. Perfect for conference calls, mobile gaming, or entertainment setups where analog sound devices need seamless integration with USB C smartphones, laptops, and portable speakers. This bidirectional adapter automatically configures as an external sound interfaces, supporting both microphone input and stereo output through its corrosions resistant alloy housing for lasting performances. Specifications: Component: Alloy Color: Gray/Orangeness Size: Approx. 1.18x0.39inch(30x10mm) Package Includes: 1x Type C to 3.5mm Female Adapter note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color from the item.