The Digital Insulation Resistance Tester has safe configuration and improved electro-circuit. It is one new item with more functions, higher precision, and easier operation. It" s also one quake-proof, dust-proof and damp-proof tester for outdoor use. Features: Capability: Can do the test at several test voltages: 100V, 250V, 500V, 1000V voltage below AC750V can be tested with resistance measurement ranging from 1 M Ohm to 20 G Ohm . Practical Function: Auto switch the range when measuring resistance data hold feature low battery reminder and high voltage indicator. Large LCD Display: Equipped with a 3 1 or 2 digits big LCD display with max value 1999, easy to read. Safe to Use: Rugged housing is dust-proof and damp-proof strong load capacity with output short-circuit current about 1.0mA protective circuit prevents damage from voltage shock. User-Friendly: Turn the rotary switch to select voltage comes with test leads, alligator clips, and a kickstand on the back. Wide Application: This tester can be applied in all kinds of electric equipment and insulation materials such as transformer, electromotor, cable, switch, appliance, etc. Specifications: Material: ABS Color: Red Size of LCD: 68x44mm or 2.67x1.73in Power Supply: 6 x 1.5V AA battery (Not Included) Working Temperature: 0-40 celsius Relative Humidity: less than 80percent Safety Level: CAT-II 1000V and CAT-III 600V Item Size: 205 x 90 x 55mm or 8.07 x 3.54 x 2.16in Item Weight: 450g or 15.87oz Package Weight: 774g or 27.3oz Package Size: 23.2 x 16.2 x 7cm or 9.13 x 6.37 x 2.75in Technique Index: Test rated voltage: 100V, 250V, 500V, 1000V Output voltage: 90percent -110percent of the test rated voltage Resistance Measurement range: 1 M Ohm - 20 G Ohm Resolution: 0.01 M Ohm Accuracy: 1 M Ohm - 200 M Ohm : (3percent of the reading and 5 significant digits) 200 M Ohm - 10 G Ohm : (5percent of the reading and 5 significant digits) 10 G Ohm - 20 G Ohm : (10percent of the reading and 5 significant digits) AC voltage Measurement range: 1V - 750V Resolution: 1V Accuracy: (2percent of the reading and 5 significant digits) Frequency Response: 40Hz - 400Hz Packing List: 1 x Insulation Tester 1 x Storage Bag 1 x Test Leads(pair) 1 x Probe Clips(pair) 1 x User Manual (English) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store