Electrical test kit. The MM300 multimeter was developed to withstand daily wear and tear on the job site and has a safety rating of CAT III 600 V, class 2, double insulation. The NCVT-1 has a bright green LED to indicate the tester is working. It changes to red and warning tones sound when voltage is detected. NCVT-1 has a digitally controlled ON/OFF power button and auto power off feature to conserve and extend battery life. Receptacle tester detects wiring configurations and indicates correct wiring, open ground, open hot, open neutral, hot/ground reversed. It does not indicate quality of ground, multiple hot wires or a combination of defects. Includes visual and audible continuity indicators up to 25Ohm. Includes test leads and batteries.