Easy-to-use with bright, multi-function LEDs Ready to measure — both kits come with everything needed for testing Audibly and visibly alerts when flaws are detected Lightweight, ergonomic design Durable : Rugged, environmentally sealed enclosure Weatherproof, dustproof and shockproof — meets or exceeds IP65 Two year warranty Accurate : Automatic self-test verifies voltage calibration Regulated voltage outputs will not drop under load Long Form Certificate of Calibration included with each instrument GroundSenseTMvisibly reassures the user that the instrument is properly grounded Conforms to international standards including ISO, ASTM and NACE