This instrument uses a low-loss, high-ratio inductance energy storage DC voltage converter to convert 12V to DC 250V/500V/1000V. It features a digital LCR bridge for resistance measurement and insulation resistance testing. Designed with multiple advantages including lightweight construction, wide measuring range, backlight display, test lock function, and auto power-off. It offers reliable performance and can be used for electrical measurements. Specifications: Color: Dark Grey; Green Material: ABS Output Voltage: DC 250V / 500V / 1000V ±10% Insulation Range: - 250V: 0.1MΩ ~ 20MΩ / 20MΩ ~ 500MΩ - 500V: 0.1MΩ ~ 50MΩ / 50MΩ ~ 1000MΩ - 1000V: 0.1MΩ ~ 100MΩ / 100MΩ ~ 2000MΩ Accuracy: ±(4% of reading + 2 digits) Short-Circuit Current: <1.6mA Medium Resistance: 250V / 500V: 2MΩ; 1000V: 5MΩ Terminal Position: L, E Voltage Test: AC 750V Voltage Accuracy: ±(1% of reading + 6 digits) Input Impedance: 1MΩ Frequency Response: 50Hz ~ 200Hz Terminal Position: ACV, G Display: 90 x 48mm LCD with Backlight Max Display: 1999 Over Range Display: 1 Measurement Method: A/D Conversion Sampling Rate: 3 times/second Operating Temperature: 0°C ~ 40°C Operating Humidity: 30% ~ 85% RH Power Supply: 8 x 1.5V LR6 Batteries (NOT Included); or DC 12V Power Adapter (NOT Included) Product Size: 170 x 120 x 60mm / 6.7 x 4.7 x 2.36in Product Weight: 528g / 18.65oz Package Size: 20 x 16.5 x 7cm / 7.87 x 6.5 x 2.76in Package Weight: 730g / 25.77oz Package List: 1 x Insulation Resistance Tester 1 x Pair of 10A Test Leads 2 x Alligator Clips 1 x User Manual (English)