1. Music audio display production. 2. LED vehicle volume level indicator. 3. Fun electronic DIY kit controlled by voice. 4. USB voice control audio spect light kit. 5. The use of a separate comparator circuit is slightly more complex, but can be accurate display. With anti-reverse connection protection diode, effectively prevent power polarity connection to burn circuit, more suitable for DIY. High brightness: All huge highlighting LED, driven by comparator circuit, better spect effect, no virtual bright clear brightness high brightness. For sound sensitivity, adjustable with adjustable Type: B:Flash from the middle to both sides Voltage: DC 5-12V Own microphone, no audio cable Power supply: 5V(powered by USB interface) Recommended MICRO-USB 5V Android power supply, universal phone charger USB, computer USB power supply Note: This is a DIY kit and you need to assemble it yourself. Color: green Material: PCB+components Package Contents: 1 x circuit board 1 set x accessories (Different batches may cause different color and appearance of accessories, don't accept the specified.but the functions are the same and not affect the use,) 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.