2x6W DC 5V 3.7V speaker modified Stereo Bluetooth amplifier board can connected lithium battery Arduino Sensor Shield V4.0 Expansion Board The charger incorporates reverse polarity

The charger incorporates reverse polarity protection that prevents damage to both the battery and charger circuitry

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The module will be automatically recognized as a standard USB video device without requiring proprietary driver installation due to UVC compliance

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2x6W DC 5V 3.7V speaker modified Stereo Bluetooth amplifier board can connected lithium battery Arduino Sensor Shield V4.0 Expansion Board The charger incorporates reverse polarity2x6W DC 5V 3. 7V speaker modified Stereo Bluetooth amplifier board can connected lithium battery 2x6W DC 5V 3. 7V speaker modified Stereo Bluetooth amplifier board can connected lithium battery This is a 2x6W Bluetooth amplifier board with charge management that can be powered by lithium battery. Small heat production in standby, good stereo quality, suitable for small Bluetooth speakers. Features: 1. Small standby heating, good quality stereo,