The BMM503 provides all the tests required for electrical installation. It is a full function insulation tester and multimeter. Built-in safety features include live circuit warning, test lockout when voltage is present, auto-discharge and more. It applies test voltage up to 1000V for readings to 10 Gigaohms. It measures AC voltage to 1000V, resistance to 9.99 Megaohms, and continuity with super-fast buzzer. Large display and analog bar graph with back light. Auto shut off saves the six AA batteries. It comes with hands-on probe for testing. 3 year warranty.