ITEM NAME:Economic Good Digital DC 5V Amplifier Board USB Power PAM8403 Audio Module Pop Features: Can use the computer USB port 5V power supply or using a mobile phone charger USB port 5V power supply battery power can also be used high efficiency:90% can provide 3W (left channel) +3 W (right channel) output power in the 4Ω load and 5V power supply.Noise canceling circuit was built in the amplifier board. A class, B class amplifier such efficiency is only about 30%. 1 x Amplifier Board. power on / off without pop noise. module has a short-circuit current protection and over-temperature protection.
