The volume can be adjusted by the switch, and the volume can be easily controlled, which is very suitable for DIY speakers. If it is a metal box, you need to bring out the antenna.Capacitor 470uf35V solid capacitor can ensure electric energy storage and heat dissipation, and a stable power supply is a prerequisite for good sound quality.The free head lead is compatible with the input power interface of this product, even if you don’t have a head adapter or battery, you can eas
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