1、USE with CONFIDENCE: The amplifier board has been repeatedly debugged to make the PCB board reasonable and simple, with strong anti interference ability 2、LOW NOISE: The amplifier board has a very high signal to noise ratio, and almost no noise can be heard near the speaker in a static state 3、LONG SERVICE LIFE: The mono amplifier is a 1.6mm/0.06in thick PCB double panel, which is sturdy and durable, and has a long service life 4、STABLE OPERATION: The power amplifier board has large heat dissipation area, stable operation and long operation time 5、SMALL and COMPACT: The small and compact body does not take up too much use space, which is convenient for storage and use Item Type: Amplifier Board Material: PCB Purpose: Power Amplifier Board Output Power: Typical 15W (maximum 20w) Speaker Impedance: 4Ω-8Ω Total Harmonic Distortion: <0.04% Signal to Noise Ratio: 105dB Frequency Response: 14Hz-100KHz (the maximum range calculated by the RC high and low pass circuit is 3.29Hz-482.29kHz) 1 x Amplifier Board