PAM8403 is an Amplifier Board that can be powered using simple 5V max and 3V min input and could drive two 3W 3W stereo speakers. It is an excellent choice for those, who want a Class-D stereo audio amplifier in a small board space. Pin Name Description L Audio Jack (TRS-Tip) Left Channel Input Gnd Audio Jack (TRS-Sleeve) Ground Channel Input R Audio Jack (TRS-Ring) Right Channel Input ~5v-3V( ) ~5v-3v DC Power VDD ~5v-3V(-) ~5v-3v DC Power GND L( ) Left Channel Positive Output L(-) Left Channel Negative Output R( ) Right Channel Positive Output R(-) Right Channel Negative Output Specification: Operating Voltage: Wide power supply ranges from 3V to ~5V or less DC Dual-channel stereo with high output power (3W 3W Output at 10% THD with a 4Ω Load @5v DC or Less) Max Gain 24 dB. Filterless architecture Low Quiescent Current and Low EMI Operating Temperature: -40 to 85°C Short Circuit Protection Thermal Shutdown Superior Low Noise