1. Made with high-quality materials for reliable performance 2. Dual 12-bit music spectrum display with ultra-compact stereo volume level lighting 3. Classic color combination: 7 green, 2 orange, and 3 red LEDs 4. When the microcontroller uses time-division sampling, slight amplitude differences may occur between the two light bars when the same signal is input through both channels 5. Suitable for a wide range of applications Color: As shown Material: PCB Parameters: Operating instructions (button press triggers corresponding LED indication): In normal mode: 1. Press and hold for 1 second – Switch modes (with corresponding preview) 2. Press and hold for 3 seconds – Toggle between real-time mode and AGC mode (with corresponding preview) 3. Press and hold for 5 seconds – Enter speed adjustment mode 4. Press and hold for 10 seconds – Restore factory settings 5. Double-click – Adjust level light brightness in cycle: low, medium, high Speed adjustment mode (enter by pressing and holding for 5 seconds in normal mode; exit by pressing and holding for 5 seconds): Press button for 1 second – Confirm selection 1. Main body rising speed (7 adjustable levels) 2. Main body descending speed (7 adjustable levels) 3. Dwell time (7 time levels available) 4. Descent speed (7 adjustable levels) 5. In real-time mode, cyclically switch zoom in/out function (7 speed levels available) Press the button to cycle through adjustable parameters Package Contents: 1 set × DIY Music Spectrum Level Indicator Lights Note: Light reflection and display differences may cause slight variations in the color shown. Measurement error allowed within +/- 1-3 cm.