Feature: 1. BLUETOOTH COMMUNICATION FUNCTION: After the APP is installed on the mobile phone, the communication between the mobile phone and the instrument can be realized by connecting with the Megohmmeter, and the measurement data can be transmitted wirelessly to the mobile phone and the report can be exported, and the test results can be collected for further statistical analysis of the data. The data stored inside the instrument can be imported into the mobile phone to support Bluetooth two way communicating, which is suitable for user secondary development 2. STABLE AND LONG LASTING: Insulation resistor multimeter has a shock proof, dusts proof structure, is a commonly used and essential instrument for electromechanical installation and maintenance, as well as for industrial enterprise sectors that utilize electricity as an industrial power or energy source 3. CIRCUIT PROTECTING: This handheld megohmmeter has a high voltage and short circuit buzzer and prevent high voltage circuit function, and can be used as an insulation measurement tool to test the insulation of heating cables and wiring 4. WITH BACKLIT: With a backlit HD LCD display and a data hold key, this digital megohmmeter makes it easy to read and record electrical measurements even in low light 5. APPLICABLE MODEL: Megohmmeter is suitable for measuring the grounding resistor of various telecommunication, electric power, meteorological, computer room, oil field, power distribution line, tower transmission line, gas station, factory grounding network, prevent thunder rod and so on. Good field resistor tester for quick inspection of electrical components or motors 6. MULTIPLE FUNCTIONS: Insulation resistor tester with range selection, data preservation function and accurate reading to meet the needs of power and home maintenance Specification: Item Type: Megohmmeter Model: UT505A BT Material: ABS and PC Power Supply Battery: 6 x AA dry batteries(not included) Short Circuit Current: < 2mA Maximum Display: 5999 Automatic Measuring Range: Yes Bluetooth Function: Yes True Valid Value:Yes Step Voltage: 50%~120% range with 10% step Absorption Ratio (DAR): Ratio of 60/15s to 60/30 insulation resistor Polarization Index (PI): Ratio of 10min to 1min insulation resistor value Timing Measurement: Yes High Voltage Reminder: Yes Automatic Discharge: Yes Analog Bar: Yes Automatic Shutdown: Yes Buzzer: Yes Data Hold: Yes Data Storage: 99 Groups Comparative Measurement Function: Yes LCD Backlight: Yes Low Voltage Display: Yes LED Size: Approx. 78 x 59mm / 3.07 x 2.32in Basic function Range Resolution Accuracy Output voltage 50V/100V/250V/500V/1000V 0%-10% Insulation resistor 50V 0.01MΩ~19.99MΩ 0.01MΩ 3%+5 20 0MΩ~50.0MΩ 0.1MΩ 3%+5 100V 0.01MΩ~19.99MΩ 0.01MΩ 3%+5 20.0MΩ~100.0MΩ 0.1MΩ 3%+5 250V 0.01MΩ~19.99MΩ 0.01MΩ ±(1.5%+5) 20.0MΩ~200.0MΩ 0.1MΩ ±(1.5%+5) 500V 0.01MΩ~19.99MΩ 0.01MΩ ±(1.5%+5) 20.0MΩ~199.9MΩ 0.1MΩ ±(1.5%+5) 200MΩ~500MΩ 1MΩ ±(1.5%+5) 100V 0.01MΩ~19.99MΩ 0.01MΩ ±(1.5%+5) 20.0MΩ~199.9MΩ 0.1MΩ ±(1.5%+5) 200MΩ~2000MΩ 1MΩ ±(1.5%+5) 2.0GΩ~10.0GΩ 0.1GΩ ±(10%+3) 10.0GΩ~20.0GΩ 0.1GΩ ±(20%+3) Low resistor measurement 20.00KΩ 0.01Ω ±(1.5%+3) DC voltage 0.0V-600.0V 0.1V ±(2%+3) Alternating current voltage 0.0V-600.0V 0.1V ±(2%+3) Load current 50V(R=50KΩ) 1mA 0%-10% 100V(R=100KΩ) 1mA 0%-10% 250V(R=250KΩ) 1mA 0%-10% 500V(R=500KΩ) 1mA 0%-10% 1000V(R=1 MΩ) 1mA 0%-10% . Package List: 1 x Megohmmeter 2 x Crocodile Clips 2 x Test Cables 2 x Probes 1 x Storage Bag