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This Stereo VU Meter module is quite simple and uses only 1 active component, IC KA2281 which has 16 pins.
power supply is DC 5 Volts to 14 Volts.
to make it compact size, then resistor component and electrolytic capacitor (e-cap or elco) can use in SMD type.
each channel use five LED's 5mm, green for low level, yellow for mid, and red for high level.
this VU meter is suitable as an additional accessory or additional display on the Home Audio Systems, 2.1 Multimedia speaker system, 2.0 USB Computer Speakers, or Home Theater Speaker System.

all components is easy find in local electronic shop, but the IC KA2281 chip maybe hard to find...
but dont worry, you can easily found and buy it on Aliexpress...