Features: 1Electrical Measurement: Insulation resistance measurement alternating current (AC) electrical measurement direct current (DC) electrical measurement. 2Good Functions: Small resistance measurement measurement data lock low battery indication large LCD digital display backlight display function. 3Reliable Performance: External direct current (DC) power supply DC9V 1.5A overrun prompt red alarm light buzzer alarm high voltage prompt. 4Scope of Application: Suitable for insulation resistance detection of motors cables electromechanical equipment telecommunication equipment power facilities etc. 5Product Parameter: To ensure accuracy ambient temperature is 235. Relative humidity is <75%. Frequency response of AC voltage is 50200Hz. Voltage input impedance is 1M. Specification: Item Type: Digital Insulation Resistance TesterMaterial: ABSColor: As Pictures ShownWeight: Approx. 927g / 32.7ozModel: GT5307AProduct Size: Approx. 16.5x11x7.5cm / 6.5x4.3x3.0inAccuracy: (a% of reading and least significant digit)To Ensure Accuracy Ambient Temperature: 235Relative Humidity: <75%Application: Suitable for Insulation Resistance Detection Of Motors Cables Electromechanical Equipment Telecommunication Equipment Power Facilities etc.Technical Parameters: technical indicatorsDisplay: 3 1/2 LCD display the maximum reading is 1999Over Limit Indication: only the highest digit displays 1 when the upper limit is exceededSampling Rate: about 3 times per secondAltitude: <2000 metersUse Environment: indoor use pollution degree 2Storage Environment: -40-60 relative humidity <90%RHOverload Protection: 100mA/60v resettable fuseLow Battery Prompt: +- symbol appears on the screenPower Supply: 6pcs 1.5V AA batteries or external current 9V adapter (without battery)Current Consumption: power consumption under no-load test <300mWShort Circuit Current: <1.8mAResistance Continuity Test: 0-2K <50 buzzer sounds test current: 1mA Base Accuracy: (0.8% reading and 6 digits)Jack Location: Insulation Resistance: E and L Package List: 1 x Tester with Protective Cover2 x Test Pen2 x Clip1 x Black Accessory1 x Red Accessory1 x Black Tape1 x Storage Bag1 x English Manual