Audio melody, visual music! Five-point LED volume indicator Package includes logarithmic LED indication 5:00 KA2284 integrated circuits as core, characterized by the following: Constant Operating voltage (3.5V - 12V) ALC circuit diode neither telescopic transistor Light intensity level in amplitude can be adjusted Points: KA2284 Printed circuit board size: 40X19mm An electronic DIY kit using KA2284, some soldering experience required. The printed circuit (PCB) is delivered with DIY kit and must be soldered, hence DIY kit. All necessary electronic components are delivered; refer to images for details. All are 0.25W metal film. Illustrative. Package includes: All components needed to build the kit 1 x 100R metal film resistor 1 x 10KR metal film resistor 1 x 2.2UF 1 x 10UF 1 x Blue and white potentiometer 1 x KA2284 5 x 5 mm diffused green LEDs 1 x Above package, other products not included. Note: Light photography and different screens may cause color differences from the actual item. Please allow a measurement error of +/- 1-3 cm.