?Smart Digital Multimeter?Thanks to its Smart Auto Mode, TESMEN TM-510 4000 counts smart digital multimeter allows you to quickly switch between all measurement tasks, including AC/DC voltage, resistance, and continuity, without selecting a mode or range. It makes measuring work easy, fast, and accurate ?Non-contact?Completely safe Non-Contact Voltage test with a visual and audible alarm; a time-saving and safe feature. You can measure the voltage on the AC wire without having to connect the wire, which makes troubleshooting the line much easier ?Safety Guarantee?CAT II 600V, CE, and RoHS certified. Overload protection measures are used inside the instrument to improve the product's safety performance and maximise users' safety. The outer silicone cover protects the multimeter from damage and potential electric shock ?User Friendly?Supports Data Hold, Automatic Shutdown, Low battery indicator, Backlight display, and Flashlight. All these convenience features make the instrument more than enough for daily use by amateurs, car owners, and homeowners. Easy to use, enjoy endless DIY fun! ?Worry-free After-sales?Package includes a digital multimeter, 2 test leads, a storage bag, 2 AAA batteries, and a user manual. We provide a 3-year maintenance service and lifetime technical support. If you have any questions or problems while using the product, don't hesitate to contact us! Product Description Automatic Shutdown If there is no operation in 15 minutes when the meter is on, the meter will automatically turn off to save electricity. Data Hold Press the data Save button and the screen will display the H symbol when the function is activated. LOW BATTERY INDICATOR When the battery voltage is lower than the operating voltage, the Low battery icon is displayed in the upper right corner of the display. Continuity Test Connect the contacts at both ends of the test lead, and it will automatically switch to the continuity mode. The buzzer will sound and the indicator light will glow green. High-Quality Battery The multimeter is equipped with high-quality batteries to enhance user experience. Multimeter Protector This digital multimeter has a protective cover to protect the multimeter from physical damage. Compact Design This voltage tester is compact and doesn't take up much space. Storage Bag It is equipped with a sturdy storage bag for easy carrying and storing of the multimeter and test leads. Easy to use Step 1. Please remove the rubber sleeve behind the multimeter, open the battery back cover, and put 2 AAA batteries into the battery compartment according to their polarity marks. Place the battery cover back on. Step 2 Turn on the multimeter, insert the test leads according to the prompts, and enter the test after the two ends of the test leads are in contact with each other for calibration. Step 3. To measure AC/DC voltage, resistance, or continuity. Insert the test leads into the multimeter and connect them to both ends of the measured object. The multimeter measures automatically without user selection. Note: No need to use test leads if you want to use the NCV function. SPECIFICATIONS Certification CE, UKCA, RoHS Altitude 2000 m Working Environment 0 ~ 40 ? Storage Environment -10 ~ 60 ? Measurable Voltage 0.8 ~ 600 v Sampling approx. 3 times / second Display 4000 counts Over Range Indication "0 L" displayed Frequency Response 40 Hz ~ 1 kHz True RMS Function Measure AC/DC Voltage, Risistent, Continuity AC Voltage 0.8V~600V; (1.2%+5) DC Voltage 0.8V~600V; (1.0%+5) Risistent ? Approx. 50? Continuity Approx. 50? Note CAN'T MEASURE CURRENT