Parameter:
Power range: 5V DC
Maximum output power: 3W x 2 (5V, 4Ω)
Dimensions: 30*20*15 mm (excluding protruding potentiometer lever)
Efficiency: 90%

Pin description:
+ OUT_L: Left channel in-phase output
PGNDL: Left channel power ground
-OUT_L: Left channel inverting output
PVDDL: Left channel power
MUTE: Mute control input (active low)
VDD: Analog VDD
INL: left channel input
VREF: Internal analog reference source, connect a bypass capacitor of VREF to GND
NC: empty feet
INR: right channel input

GND: analog ground
SHDN: System shutdown control (active low)
PVDDR: Right channel power
OUT_R: Right channel inverting output
PGNDR: Right channel power supply ground
+ OUT_R: Right channel in output phase

Note:
1.You can use the USB port on computers to provide 5V power supply for the amplifier board.
2.Potentiometer with switch, can adjust volume and control power switch.
3.Suitable for battery or portable electronic products, suitable for long-term use.
4. Please make sure the operating voltage is less than 5.5V, otherwise the module will be damaged.
5.Without reverse polarity protection, which means the module will burn out if the wires are connected incorrectly.
6. Please note that DO NOT connect the device to the power supply when you have connected the speaker, otherwise the module will be destroyed.

Package includes:
3 x PAM8403 Mini 5V Digital Audio Amplifier Board