FY117 500V Digital Multimeter LCD Display Pen Type NCV AC DC Voltage Meter Tool for Electrician Item Type: Multimeter Material: ABS Model: FY117 Power Supply: AAA 2 x 1.5V (Battery Not Included) Purpose: Electricity Numerical Measurement Measuring Range: Automatic Overload Protection: Full Range Working Height: Up to 2000m Display: LCD Dual Display Maximum Display Value: 2000 Digits Polarity Indication: Self Indicating, Indicating Negative Polarity Over-Range Display: "OL' or OL" Sampling Time: Approximately 0.4 seconds for the digital display of the meter Unit Display: Function and battery unit display Automatic Shutdown Time: 5 minutes Temperature Coefficient: Less than 0.1 x accuracy/℃ Working Temperature and Humidity: 0-40℃/32-104℉, 45%-70% RH Storage Temperature and Humidity: -10-60℃/-4 -140%℉, 45%-70% RH Main Function Range Resolution Accuracy DC Voltage 500V 1V ±(0.8%+3counts) AC Voltage 500V 1V ±(1.2%+5counts) Resistance 10MΩ 0.1MΩ ±(1.2% +3counts) Frequency 1000Hz 1Hz ±(2.0%+3counts) Voltage DC or AC, frequency, resistance measurement continuity: 1. Insert the red test lead into the "INPUT" terminal and the black test lead into the "COM" terminal. 3. When the resistance is less than 30Ω, the buzzer will sound. 5. Read the measurement result from the display. 1. Press the power button. 3. Place the sensor head of the tester close to the wire and insert the probe into the jack. The tester detects that one of the strong induction signals is the live wire, and the weak or no induction signal of the induction signal is the neutral wire. Switch mode: Green button: Long press to switch modes, short press to turn on the flashlight.