Description: onboard TDA2030A audio power amplifier chip. mono 18w power amplifier circuit design. socket onboard horn .working voltage: 6-12v. the onboard 10 k adjustable resistance, can adjust the volume of the amplification. the onboard power light.chip has lead to the main pin, can directly input audio signal Specification: board size: 31.6*23.2(mm). Package Includes: 1piece TDA2030A Amplifier Board