Specifications Model UT501AOutput Voltage 100V 250V 500V 1000VAC Voltage Measurement Range 30V 750V ±2 3 Short Circuit Current ≤2mADisplay LCD with backlightPower Supply 6 x 1 5V alkaline batteriesBody Dimensions 150mm x 100mm x 71mmBody Weight 500gFeatures 1 High Precision Insulation Testing Offers ultra accurate readings for insulation resistance up to 5 5GΩ making it highly suitable for complex electrical evaluations in high voltage environments 2 Multiple Voltage Output Selections With 100V 250V 500V and 1000V output voltage options this tester can handle a range of electrical applications enhancing user flexibility 3 Enhanced Safety Features Equipped with overload indication light alert buzzer alarm and automatic discharge to ensure maximum safety during operations 4 Comprehensive Data Interface The LCD display with backlight provides clear readings in low light conditions while the secondary voltage display adds extra convenience during tests 5 Built in Internal Resistance Testing Capability Includes a dedicated function for testing 10MΩ internal resistance helping users address troubleshooting and performance control efficiently Package Included 1 x Insulation Resistance Tester KitNote Battery is not included