OLED Music Audio Spectrum indicator 15 Level indicator Desktop MP3 PC Amplifier Speed Adjustable AGC Mode(J)

So why just 4 stars? Because I was sent the wrong item. I should have received a spectrum display. Instead I got a left / right channel display. Plus zero instructions. Not even a website link with some instructions. Having said this the display is excellent. Strong orange on a black background. I've puzzled out the 3 buttons on top and I've been able to manipulate the display as needed. If it came with clear instructions I would have given the Oled Music Audio Spectrum indicator 5 stars (even considering it is actually a left / right channel indicator).