Devantech USB-RLY02 2 Channel 16A Relay Board Controlled Via USB

USB - Universal Serial Bus

LED - Light Emitting Diode - a small light source

Red - One of the three primary colours

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

LED - Light Emitting Diode. A bulb that is very efficient at producing light. Often small.

Performance - When someone is presenting a form of entertainment, also how well someone is doing within a role.

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