Martindale ET4 Electrical Tester 200A AC/DC

LED - Light Emitting Diode - a small light source

DC - Direct Current

AC - Alternating Current

Frequency - A term used to describe how often something is done

Frequency - A wave frequency is the number of times a wave repeats within a given time

compact - Carefuly designed to ensure an item has a minimal physical size

Electrical - Something that requires electricity to work.

Compact - something that has a lot combined within a small space.

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

Voltage - A measurement of volts.

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