DROK audio amplifier board working voltage is DC 5V, output power is 5W (2O 5V)/3W (4O 5V) / 1.8W (8O 5V). Input method is monaural input. 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.