SPEC Size: 117*58*26mm/4.61*2.28*1.02inch Color: Black-Red Measurable Resistance Range: 1Ω-40MΩ Working Temperature: 0-50 ℃ Voltage: 0.8V-600V FEATURES AUTO RECOGNITION: The multimeter automatically switches between voltage, resistance, and continuity tests when powered on, ensuring a seamless user experience for various electrical tasks. VOLTAGE MEASUREMENT: Red/black probes touch live/neutral wires, and the screen auto-displays the voltage value. Red/black probes touch positive/negative battery terminals, and the screen shows the voltage value. RESISTANCE MEASUREMENT AND CONTINUITY TEST: Red/black probes touch the 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. LARGE HD DISPLAY: The 33*25mm/1.3*0.98inch HD screen comes with a bright white backlight, which can be turned on with a single button press. Long pressing the button activates the built-in flashlight for additional visibility in low-light conditions. AUTO SHUTOFF: Powered by batteries, 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. Package Includes: 1 * Compact Digital Multimeter Tester With Auto Recognition