6-12V Power Supply 18W TDA2030A Audio Amplifier Board ModuleProduct Description* Brand new and high quality. * Onboard TDA2030A audio power amplifier chip. * Mono 18 w power amplifier circuit design. * Socket onboard horn . * 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. * Working voltage: 6 -12 v. * Board size: 31.6 (mm) x23.2 (mm).