Features: 1. It is composed of pickup, amplifier, microcontroller and LED 2. Voice-activated induction, no need to connect the audio cable 3. Adjustable sensitivity, automatic sensing sound melody 4. Display refresh speed, audio response sensitivity, sampling frequency and other parameters can be set 5. Multi-color LED lights, suitable for scenes pickup rhythm beat Product parameter: type: Without Shell Kit name: -052 Voice-activated in-line LED Music spectrum Kit Power supply: USB power supply 5V Operating voltage: 5V Instructions for use 1. Insert the USB, and power on the device 2. Adjust the pickup sensitivity using RP1 3. Hold down SW1 to switch Settings and press SW. 1 Select parameters PCB board size: 123 x 62mm Material: PCB,Electronic Components colour: Black Package Contents: 1 x DIY electronic kit 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.