Features:
- Load: can direct drive 4 or 8 ohm, small speakers
- Operating voltage: 2.5v~5.5v
- Speaker power: 2~8w
- 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
- Noise canceling circuit was built in the amplifier board, no pop noise when power on / off, with short-circuit current protection and over-temperature protection
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