The item is designed to test socket if connects positive and negative pole as required and whethter household power protection systems works well or not. It can timely remind the user to make adjustment regarding the breakdown and potential safety hazard. It tests your protection system to ensure the household electrical safety.

7 LED light patterns: with 7 easy to read indicators to indicate the state of the socket, easy to judge.

Specification:

Plug: EU Plug, US Plug (Optional)

Nominal Voltage Un=220-250v(AC) 50-60Hz—EU Type

                                  90-120v(AC) 50-60Hz—US Type

Rated residual operating current  I△n=30mA

Earth resistance meets the standard

7 LED light patterns.