1Pc DC 5V Mini Class-D Digital Amplifier Board LCD PAM8403 Audio Module 

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 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

noise canceling circuit was built in the amplifier board

power on / off without pop noise

module has a short-circuit current protection and over-temperature protection

Application:

LCD TVs， monitors，

Laptop

Portable Speakers

Portable DVD players， game consoles

Phone / speakerphone

Specifications:

Operating voltage: 2.5V-5.5V

Speaker With:4-8ohms recommended:4 ohms

Speaker Power :2-8W

Size:21 x 18 x 3.4mm(L x W x H)

Color:As the pics show

Net weight:1g

Package weight:11g

Package include:

1 x amplifier board