Easy to use, advanced socket tester. Checks socket connections, RCDs, mains polarity and earth fault loop impedance. Indicates safety via high definition LEDs.

_Ensures maximum safety by checking quality of earth loop return path, Offers more functions than regular socket testers
_Using the device is simple - just plug it into the socket you wish to test (the device is designed to fit in standard UK three-pin plug sockets) and once connected the 107 will begin evaluate wiring status and display these results as LED indicators.
_Automatically runs wiring checks upon insertion into mains, Has Red and Green LEDs.
_Releases a continuous tone for satisfactory results. Releases a warble tone for fault.
_Checks for the polarity of the mains supply., Checks RCDs with measured current.