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CKE VU CIRCUIT PCB IS BUILT IN KA2281/ CD2281 Audio Level Indicator Pro Audio level indicator Module Board, Just connect Power supply through battery snapper OR Any DC POWER and a Audio signal from any audio source volume control. The KA2281 /CD2281 Audio level Indicator Module provides a visual indication of dynamic Audio level using LEDs.The module uses the KA2281 / CD2281 LED Dot Level Meter Driver IC to implement a logarithmic LED dot indicator display. The display consists of 10 LEDs In two channel (5+5) – 4 Blue, 4 green and 2 red which are in sequence as the input voltage increases. Yellow is power LED indicates power on/ of the Circuit. A single-turn potentiometer 100 K is used to set the range for the display of led as per sound volume from device. Module Connections There is a 3 -pin header on the assembly for making connections. 1 Pin Header is of VCC Connect to 9 to 12 V - DC ( Power Supply ) - 2 and 3 Pin Headr for ( Audio Signal ) IN = Audio signal input Feature: The amplitude of the level can be adjusted by variable resistance placed on the circuit board. Specification: Chip: KA2281 / CD2281 Supply voltage: 9V-12V PCB board size: 75 mm X 50 mm X 1.6 mm Packing weight: 20 gm.Its contains ONE MODULE with Connecting wires and others fixtures.