Digital Multimeter 4000 Counts Auto Ranging Voltage Tester NCV Resistance Meter Tool Item Type: Digital Multimeter Model: AN109 Material: ABS Battery: 2 x 1.5V AAA battery, shipped without battery. Function: Can measure AC and DC voltage, resistance, circuit continuity. Note: Unable to test current.  Working Temperature and Humidity: 0-40℃. <80%RH, <10℃, non condensing. Altitude: <2000m Storage Temperature and Humidity: -10~60℃, <70%RH, remove the battery. Over Range Indication: Display OL Maximum Count: 4,000 Sampling Rate: 3 times per second. Data Retention: Yes Display Screen with Gear Display: Yes NCV Non Contact Detection: Yes Data Retention: Yes Battery Undervoltage Indication: Yes Automatic Shutdown: Yes Flashlight: Yes DC Voltage: 4V with 0.001V resolution. 40V with 0.01V resolution. 400V with 0.1V resolution. 600V with 1V resolution Measurable Voltage: 0.8~600V Overload Protection: 600V Maximum Measurement Voltage: 600V AC Voltage: 4V with 0.001V resolution. 40V with 0.01V resolution. 400V with 0.1V resolution. 600V with 1V resolution Measurable Voltage 0.8~600V Overload Protection: 600V, effective of 40-1000Hz. Resistance: 4KΩ with 0.0011k Ω resolution. 40KΩ with 0.01K Ω resolution. 400KΩ with 0.1K Ω resolution. 4MΩ with 0.001M Ω resolution. 40MΩ with 0.01M Ω resolution Overload Protection: 250V On and Off Test: Resistance < about 50 Ω, buzzer sounds, indicator light turns green.