Parameters:Audio amplifier board working voltage is DC 5V, output power is 5W (2 5V)/3W (4 5V) / 1.8W (8 5V). Input method is monaural input. Artificial Material: this New-designed mini power amplifier is made of noble black immersion gold circuit board, imported KEMET speaker capacitor, large-capacity filter capacitor for channels. Besides, we customized black copper terminal blocks and gold-plated audio input terminal blocks for this new amplifier module.