1. Connecting a computer USB does not require a driver, and can also be connected through a mobile phone OTG. 2. Using an active crystal oscillator, the clock jitter is that of a passive one. 3. The coaxial output is transmitted through an isolation transformer. 4. The PCB board adopts arc-shaped wiring to reduce signal delay and rebound caused by wiring, and improve the performance and quality of signal processing. 5. It adopts -plated coaxial seat, available in yellow and red for random shipment, No designation accepted. This model has good resolution, elastic bass, thick vocals, beautiful sound, good taste, and high cost-effectiveness. Default coaxial fiber output, short-circuit the P2 interface on the circuit board to l2S output. USB sound card USB to coaxial fiber I2S decoding chip PCM2707 PCM2706 audio decoding audio amplifier sound card ecoding chip PCM2706 Output sampling rate 44.1K 48K USB to coaxial fiber 12S, using company's CM2706 decoding chip, has better performance than the PCM2704 and CM108. Color: As Shown Material: PCB Package Contents: 1 * Converter 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.