Pam8406 Digital Amplifier Module with Volume Control Potentiometer is an excellent noise suppression module. If you do not receive input audio, you will not hear any noise on your ears.This module has a double channel stereo output. Its 5V Power Supply Gives the Output of 5w+5W Power, Can Directly Drive the 4 Omega, 8 Omega Small Sound Box, The Output Power Is Big, The Energy is Full, The Sound Quality is Good, With the Volume Adjostent of the Ribbon. and left channel.features: Excellent noise suppression. In the absence of contact input Audio, you will not heard any put your earth, 5V POWER SUPPERS CAN OUTPUT 5W + 5W POWER, DIRECTLY DRIVE 4, 8 SPEAKERS, OUTPUT gy , Good Sound Quality, with Left and Right Channel Volume Adjustment.Unique Non-Lc Filter Class-D Digital Power Board, It Can Be Used Directly For the USB-Powered From Computers. Ance and channel Crosstalk caused by the wiring betweenultra-miniature design, it can easily be placed in a small space inside a variety of Digital Products, High Amplification Efficiency.SOLDER by Machinetheethe. Limit Operating Voltage 5.5vthe Unique D Type Digital Power Plate with LC Filter Can Be Directly Powered by the USB of the Computer.Double Panel Wiring, Properly Solves the Ground Potential Balance Caused by Wiring and Inter-Channel Crosstalk.The Ultra e of various digital products , and the amplification efficiency is super high.the whole board is welded by machine. The welding Quality is Comparable to That of the Manual Soldering Iron