DC3.5V-5V 10W Type-C Bluetooth Mono Audio Amplifier Decoder Board TWS 3.5mm DIY
2,37 €
Easy to use: support 3.5mm audio input, support TWS pair connection, enhance the flexibility of use. Get the bluetooth board against the following wiring diagram welded speakers and 3.7V lithium batteries and then check the battery is not connected to the reverse can be turned on to test, turn on the switch blue indicator should be lit, if not lit should be quickly shut down to check the battery has not been installed correctly.
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