CHENBO(TM)5PCS PAM8403 module Super board 2 * 3W Class D digital amplifier board efficient 2.5 to 5V USB power

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 4? load and 5V power supply conditions A class, B class amplifier such efficiency is only about 30%,D class amplifier is highly respected today D class amplifier efficiency is extremely high, not because of temperature affect the sound quality but do not add heat sink and take less space Application: LCD TVs, monitors, Laptop Portable Speakers Portable DVD players, game consoles Phone / speakerphone