Features: brand new and high quality This music visualization spectrum has an innovative design and a perfect combination of music and art, suitable for music and electronic lovers. Please make sure that the audio signal input voltage is within 5V, otherwise the sound spectrum will be damaged. High-speed signal acquisition, accurate response: Using 32M crystal oscillator and 1T microcontroller, the chromatogram has high-speed signal acquisition and accurate response. Excellent visual effects: 16-segment golden ratio design, 6 color LEDs of red, yellow, green, blue, orange and pink, with excellent visual effects. It is also a pleasant and beautiful art decoration. 8 classic display modes: 1. Columnar mode; 2. Columnar with for peak holding mode; 3. Columnar with peaks, with the top of the for peak moving upward; 4. Mirror mode, from the middle to both sides; 5. Single-point mode; 6. for Peak Move up out of the mode; 7. Single-peak mode; 8. Mute all lights mode (can be used to test LED). for Key operation: Short press the for key to switch between eight classic display modes; long press the for key for 1 second to adjust between 6 levels of gain; long press the for key for about 3 seconds to switch. (Please adjust the input volume and gain to make the display amplitude within a proper range (the default value is 3).) Specifications: Material: Acrylic A Size: Approx. 2.71x1.57inch(6.9x4cm) B Size: Approx. 2.71x1.57x11.29inch(6.9x4x28.7cm) Package Includes: A: 1 Set Parts of Product Or B: 1x Finish Product note: A is a spare part which need to be welded by yourself. B is a finished product which can be used directly. Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.