Supply Voltage Range - +9 volts to +18 volts, +12 volt recommended

Battery Operation - can be run using +9v or +12v Battery.

Signal Input - Speaker Output to be connected parallelly in to Sig. IN connector, Adjust RV1 to required level.

LED's - 10 LED's of 3 mm or 5 mm can be used in this board.

Bar Type Display - Pin 9 is connected to positive supply, Bar mode active.

Compact size - PCB size 38 mm x 72 mm ( 1.5 inch x 2.8 inch ) PCB thickness - 1.6mm.

Low cost - This VU meter board has a fraction of cost compared to similar boards available in market.