This USB-A external stereo sound adapter features external audio controls for added functionality and convenience. External volume contro Unique mute-switch design with independent earphone/mic, mute buttons Supports two headsets being used at the same time Features smart noise-reduction chip for better audio performance Universal compatibility Input: USB-A Male Output 1: 3.5mm green port for earphones Output 2: 3.5mm red port for microphone Output 3: 3.5mm CTIA 4-pin combo mic/headphone jack Sampling rate: 48KHz, 16 bit SNR: +/= 85dB Frequency response: 20Hz-20KHz
