Power supply voltage: DC 5V-10V For example: VCC connects 5-10V GND connects GND. Be careful not to reverse the power supply, otherwise it will damage the board, and the voltage exceeding 10V will also damage the board In addition to VCC GND connected to the power supply, the remaining GND LRCK DATA BCK connected to the I2S signal input (this board does not need to be connected to the MCLK chip internal PLL up-conversion to generate MCLK clock, the effect is much the asynchronous clock. The internal PLL up-conversion only Used to generate the internal MCLK clock, the audio sampling rate cannot be increased) the Support I2S /left-justified (left-aligned) signal direct input (need to switch manually) Supports two filter modes: normal mode or low latency mode (set on the FLT port of the board) Added a headphone output interface, which can be directly connected to a 3.5mm interface headphone The highest support 32bit data 384K sampling rate The detailed interface has been marked on the board The signal-to-noise ratio is 112db, the distortion is -93db, and it directly outputs 2.1V audio voltage. The high frequency has no glitches, the low frequency is full, and the dive is good. Super ES9023 Color: black Material: plastic Package Contents: 1 xAudio Module 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.