TESTBOY 20 Plus Voltage-proofed continuity tester The Testboy 20 Plus is the further development of the most sold continuity tester Testboy 2 in Germany. Due to the non-contact voltage sensor, AC voltages can be detected through the insulation. Defective lamps in chains of Christmas lights, or similar, are indicated accurately within seconds. The current warner installed, warns of a voltage that is a risk to life. The electronics also enable a single-pole phase search. How you benefit: | Reliable continuity tester | Non-contact voltage sensor | High-performance LED torch Specifications Technical Data Power Supply Overload Category Integrated LED-torch Lamp Supplies, Optional Crocodile clip Carrying case Continuity Test Test voltage Test current External voltage protection