3.5mm TRS to USB-C audio adapter jack is for external wireless lavalier microphone systems to record audio to your cell phone Connect the wireless receiver's output port using the 3.5mm TRS male adapter directly to your phone's USB Type-C port. No need to add other adapter cable Plug and play to recording audio 50cm coiled cable Build-in audio chip - assurance you a clean and clear sound Depending on the batch, there may be slight differences in product appearance and workmanship, which does not affect use. Colour:random color , don't accept the specified color Material:plastic Size:Length: about 50cm Package Contents: 1 x USB C to 3.5mm Elbow Spring Retractable Audio Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.