Di-Log DL1092 Socket Tester C/w RCD Test, Earth Volt Test

LED - Light Emitting Diode - a small light source

RCD - A residual-current device is a safety switch mechanism used to prevent electrocution.

Earth - A planet third from the sun. Similar size to Venus but rich in water and complex life.

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

Wide - Something with a large width.

Simple - Basic, easy no difficulty in understanding.

Reliable - Something that is consistently good and can be trusted.

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