CRT TV music visualizer, w/Freeze function

https://www.etsy.com/listing/18342174...

This is a sound visualizer/ oscilloscope that I made from a vintage CRT monitor.
Connect it to your amplifier or stereo like a speaker, and it displays the sound waves.

It has the ability to freeze moving waves in place, by turning the knob on the back.

Features
5-inch black-and-white screen (measured diagonally)
power on/off button on top
power LEDs on top
has 2 spring-connectors on the top for connecting wires, like a speaker.
Brightness and Contrast can be adjusted with knobs on the back (although I would just leave them, at the highest settings)
powered by a detachable AC adapter, included.
it measures about 8x8x6 inches