5Pcs XY-AP50H 50W+50W HIFI Bluetooth 5.0 Wireless Audio TPA3116D2
Digital Power Amplifier Stereo Board 50Wx2 Amp Amplifi

USB - Universal Serial Bus

Bluetooth - A short range wireless mainly used for connecting to mobile phones

Digital - A system that uses only 0s and 1s to transmit data

Audio - Also known as sound. An audible vibration wave which can be heard.

USB - Universal Serial Bus. A method of connecting a device to a computer

Wireless - A wire free device that uses radio and microwaves to send signals.

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