[Foot Position Explanation] MCK: I2S MCK Input (NC, default not connected) DATA: 12S DATA Input BCK: I2S BCK Input LRCK: I2S LRCK Input 3V3_OUT: 3.3v output, reserved for external power supply GND: Ground [Product Features] 1.Using the original es9039q2m chip and optimized by software control 2. The use of high-precision active crystal oscillator ensures excellent signal-to-noise ratio for the entire machine. 3. Built-in power supply and audio signal indicator lights 4. Utilize the ES9601K professional headphone amplifier, featuring 3.5 analog audio output, which is more convenient. 5. Type-C power supply, linear voltage reduction, tantalum capacitor filtering, resulting in cleaner power supply 6. Supports 12S/DSD digital audio input 7. Reserved external power supply, supporting a wide voltage range of 5-12V for power supply. 8. The pin connector has a standard 2.54 pitch spacing. [Note: MCK is generated by PLL. No external MCK is required! ] [Note: The USB port is solely for power supply and does not have data transmission capabilities! ] Color: As Shown Material: PC+Metal Package Contents: 1*ES9039Q2M Decoder 1 x 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.