The 3.5mm ports accept 4-pole 3.5mm TRRS connectors and support simultaneous stereo audio output and headset/microphone input. The adapter also features an integrated 2.75in (7cm) USB-C cable. Headset Mic/Stereo Audio Control on the 3.5mm Ports Connect two headsets to the same USB-C port. Microphone input is supported across both headsets, offering a convenient solution for team training and conferencing calls. The adapter supports dual CTIA or dual OMTP headset types allowing universal compatibility. Lossless Audio with High-Impedance Headphones The USB-C headset dongle features built-in 24-bit Digital to Analog Converter (DAC). The DAC supports a sampling rate of up to 192kHz for uncompromising quality and performance. Compact USB-C Audio Adapter The USB-C to dual-audio adapter is small and lightweight, perfect for professionals who are frequently on the go. It is the ideal solution for adding two 3.5mm audio jacks to a USB-C device. This product is backed for 2 years, including free lifetime 24/5 multi-lingual technical assistance.