The TNZ SGVUM6 is an audio stereo VU Meter with 128 full color LEDs for dynamic display of music/sound fields, perfect for any sound systems (home audio, car audio, Pro). ???For All Sound Systems?: The TNZ SGVUM6 is an audio stereo VU Meter with 128 full color LEDs for dynamic display of music/sound fields, perfect for any sound systems (home audio, car audio, Pro). ???Easy Connections?: With rear RCA + 3.5mm auxiliary input/output, it's compatible with various audio systems, such as stereo amplifiers and preamps, Hi-Fi systems, home theater systems, mixing consoles. ???Specific Features?: Built-in noise reduction processing, adjustable input and output gain, supports switching between microphone input (wireless input) and line input. ???Wireless Input?: A built-in microphone allows displaying the sound level on 2 x 64 LEDs/channel, without needing any wired connections. ???19 Colors option and Some Other Features?: Up to 19 colors option, with Brightness, Speed, Gain adjustments.