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3W+3W Power: Power Amplifier Module can be powered by computer USB 5V, or phone charger 5V, or lithium battery. High efficiency 90%, can provide 3W (left channel)+3W (right channel) when using 4Ω load and 5V power supply. High Amplification Efficiency: PAM8403 mini type D digital power amplifier can be easily put in small space of many digital products, high amplification efficiency. Ingenious designed: Type D power amplifier has very high amplification efficiency, sound quality will not be effected by temperature rise, no need of heat sink. Broad Range of Applications: Audio Amplifier Board is widely used for LCD TVs, monitors, laptops, portable speakers, DVD players, game players, phones. High Performance: Electronic Amplifier Dual Channel is build-in noise reduction circuit, no noise when power on/off, supports short circuit, over current and over temperature