Function: 1. Digital Multimeter: Equipped with AL smart auto mode, the 4000 count smart multimeter allows you to quickly switch between all your measurement jobs, including AC and DC voltage, resistance and continuity, without having to select a mode or range. Makes measurements simple, fast and accurate. 2. Non-contact testing: Fully safe non-contact voltage test, light and sound alarm. Time saving and safety. No wires need to be connected to measure AC line voltage, making line maintenance easier. 3. High safety: The instrument adopts internal overload protection measures to improve product safety and maximize safety. The outer silicone cover can protect the multimeter from damage and potential electric shock. 4. Various functions: supports data storage, auto power off, low battery indicator, backlit display and flashlight. All these convenient features make the instrument sufficient for everyday use by amateurs, owners and so on. Easy to use, enjoy endless DIY fun. 5. With LED light: Independent LED light, easy to work in the dark. The dashboard can replace the battery by removing the bottom screw, then sliding the bottom case off and replacing it with a new one. Specification: Item Type: Digital Multimeter Model: AN109 Material: ABS Battery: 2 AAA 1.5V batteries, supplied without batteries. Function: can measure AC and DC voltage, resistance, circuit continuity. Working temperature and humidity: 0-40. <80%RH, <10, no condensation. Altitude: <2000m Storage temperature and humidity: -1060, <70%RH, remove the battery. Over Range Indication: Display OL Maximum number: 4000 Sampling rate: 3 times per second. Data storage: Yes Display screen with gear display: yes NCV non-contact detection: yes Data storage: Yes Battery low voltage indicator: yes Auto power off : 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: 0.8600V Overload protection: 600V Maximum measuring voltage: 600V AC voltage: 4 V with 0.001 V resolution 40 V with 0.01 V resolution 400 V with 0.1 V resolution 600 V with 1 V resolution Measurable voltage 0.8600V Overload protection: 600 V, effective 40-1000 Hz. Resistance: 4KΩ with 0.0011kΩ resolution. 40KΩ with 0.01KΩ resolution. 400KΩ with 0.1KΩ resolution. 4MΩ with 0.001MΩ resolution. 40MΩ with 0.01MΩ resolution Overload protection: 250V On and off test: Resistance < approx. 50 Ω, buzzer sounds, indicator light turns green. Package List: 1 x digital multimeter 2 x probe 1 x User Manual 1. Remove the rubber cover behind the multimeter, open the back cover of the battery compartment and place 2 AAA batteries in the compartment according to the polarity markings. Cover the battery compartment. 2. Open the multimeter and insert the test probe as prompted. When the two ends of the test probe touch each other for calibration, start the test. 3. Measure AC and DC voltage, resistance or continuity. Insert the test probes into the multimeter and connect them to both ends of the test object. The multimeter takes measurements automatically, without user selection. 4.