1. Voltage MeasurementSimply connect red/black probes to live/neutral wires or positive/negative battery terminals, and the screen will instantly display the voltage value. This straightforward method makes it easy to measure voltages accurately in different scenarios. 2. RESISTANCE MEASUREMENT AND CONTINUITY TEST: Connect red/black probes to resistor or circuit ends, and the screen shows the resistance. The continuity test emits an alert sound for connected circuits and remains silent when open. 3. AUTO SHUTOFF: The multimeter automatically shuts off after 15 minutes of inactivity, preserving battery life. You also have the option to disable this feature if needed for prolonged use. 4. Smart Auto Mode for Effortless Measurements: The TM510 4000 Counts Multimeter automatically switches between voltage, resistance, and continuity testing without manual mode/range selection. Its intelligent autorecognition ensures quick, accurate results for electrical tasks.