wrist strap tester to test the working condition of wrist strap High,normal,low LED light indictation Features: 1.Precise, quick and convenient to test the grounding system.2.Can be used to test wrist and grounding wire, wrist to skin , antistatic plate, antistatic mat and grounding wire.3.Easy to test safety.power. adapter.4.Avoid damage by static.SpecificationsBK498 Wrist strap testerIndicators ...