HEAT INSULATION Electrical circuit not more than Low voltage 600V, Insulation resistance of Electric installation, voltage measurement DC/ AC auto detect     , Resistance measurement, Continuity check - Automatically-held readings after measuring M© The LED level meter shows the reading - The instrument makes only necessary voltages enabled between 15V, 25V, 50V, 100V, 125V, 250V, and 500V - Easy-to-read LCD with the fixed decimal point - Provides the probe that enables you to measure through a hole of a circuit breaker cover - The lighting lamp illuminates a place to be measured and the LCD has a backlight.