Description: Audio amplifier chip: LM386 Simple external circuit, amplified audio signal. Simple Circuit, less use of components, easy to weld. Great sound volume, high efficiency. Widely used in small speakers and other equipment. Specification: Operating voltage: DC 5V-12V Driver Speaker: 0.5W-10W Speaker PCB Size: Approx. 37x41mm/ 1.46x1.61 inch The main circuit LM386 audio amplifier chip and audio input adjust circuit. The size of the input audio signal can be adjusted by potentiometer, thereby controlling the size of the output of audio. Package Includes: 1 Piece of LM386 Amplifier Board Kit