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This is an audio amplifier module with potentiometer with PAM8403 which is very efficient. To use it, all you need is a power supply between 3.6 V and 5.5 V, two 3 W speakers and impedance of 4 ohms and an audio jack connection device .SpecificationsVoltage: 2.5V to 5.5 VOutput: 3W * 2..