Product Details ：Multifunctional Amplifier Board:amplify Weak Signals From The Sound Source Or Preamplifier And Push The Speaker To Play Audio Amplifier Power Amplifier Board:2.1 Channel 2x30w+60w Use High-performance Capacitors:with Pulse Intensity,high Reliability,good Self-healing Compatible Audio Video Equipment Style:speakers,amplifier,player,digital-to-analog Converter (dac),professional Audio Equipment,stage Equipment Power Output:2x30w+60w Note: 1.the Higher The Voltage, The Louder The Sound. Please Give Up This Misconception. Only The Right Power Supply And The Right Speakers Can Produce Sound. 2.the Power Supply And Speakers Determine The Output Power Of The Amplifier. 3.our Power Amplifier Input Dac Generally Requires 1.5v-2v. If Your Decoding Dac Output Is 500mv-1v, That Is Not Enough. Even If Your Power Supply And Speaker Are Adapted, The Power Amplifier Output Cannot Reach 2x30w+60w. 4.32pin Tpa3118 Power Amplifier Chip. Colour:green Material:plastic Package Contents: 1 X Tpa3118 Amplifier Board