Feature:1. USER FRIENDLY: The inner upper cover is marked with wiring diagram, so there is no need to worry about not knowing how to connect the wires.2. HARD BOX: Waterproof and shockproof when the cover is closed, the shell is hard that is resistant to bumps, safer to use.3. LCD DISPLAY: High definition LCD display screen, clear at a glance, all functions displayed on the same screen, rich color design, looks very comfortable.4. DATA UPLOAD FUNCTION: You can upload the stored test data to the computer through a USB communication cable.5. POWER SAVING: This digital megohmmeter will automatically shut down after 15 minutes of power on, saving power.Specification:Item Type: Insulation Resistance TesterMaterial: ABSModel: ETCR3520BInsulation Resistance Range: 0.005M~20.0TShort Circuit Current: 7mADC: 0V-800V; Accuracy: 5% rdg 3vAC: 0V-700V; Accuracy: 5% rdg 3vWorking Power Supply: Rechargeable lithium battery 6200mAh x 1 (built in)Polarization Index Test: YesAbsorption Ratio Test: YesCapacitance Test Range: 10nF~200uF; Accuracy 10% rdg 10nFReal Time Current Display Test Current Value, Current Display Range: 0.001nA~7.5mACustom Setting Time: 10-3600sTest Timer: Automatically record test time, timing range: 0s~9999sUpload Function: Upload the stored test data to the computer through a USB communication cableAutomatic Shutdown Function: Automatically shut down after 15 minutes of power onProtection Grade: Close the cover IP65, open the cover IP40Working Environment: -20~50; 80% rhStorage Environment: -25~65; 80% rhInsulation Resistance: 50M (1000v) (between the test line and the shell)Suitable Safety: AC 3kV 50Hz 1min (between test circuit and the shell).Package List:1 x Insulation Resistance Tester1 x Power Plug1 x Adapter1 x USB Data Cable3 x Test Line1 x Test Pen1 x Crocodile Clip1 x Hook1 x Cloth Bag1 x Instructions1 x Accessory