With the HT Automatic Digital Multimeter's Mode, it lets you quickly switch between all measurement tasks, including AC voltage, resistance and continuity, without having to select a mode or range. It makes measurement work simple, fast and accurateDigital Multimeter Completely safe non- voltage testing with visual and audible alarms; a time-saving and safe feature. TM-510 Digital Multimeter External Silicone Cover protects automatic digital multimeters from damage and potentialYou can use the digital multimeter TM-510 to intelligently measure voltage on AC power lines without connecting wires, making lines troubleshooting much easierHas passed and RoHS certification. Overload protection measures are adopted inside the instrument to improve the security performance of the product and maximize user security.The electric automatic digital multimeter supports data retention, automatic shutdown, low battery indicator, backlight display, and flashlight functions. All these convenient features make this instrument adequate for daily use by hobbyists, car owners, and homeowners. Simple and easy to use, enjoy endless fun.voltage: 0.8-600V (: 610V)ACResistance: 600kCount: 2,000 countsNCV: YesDisplay with gear display: YesData retention: YesBacklight: YesLight: YesLowIndication: YesAuto Power Off: YesMaterial: ABSPower Layer: 2x1.5V AAA (not included)how to use:Step 1. Please remove the rubber cover on the back of the multimeter, open the battery back cover, and put 2 AAA battery into the battery compartment according to the polarity marks. Replace the battery cover.. Turn on the multimeter, insert the test leads according to the prompts, and enter the test after contacting both ends of the test leads for calibration.Step 3. Measure voltage, resistance or continuity. Insert the test leads into the multimeter and connect them to both ends of the object being measured. The multimeter automatically measures without user selection.notes:If you want to use the NCV function, you do not need to use test leads.Colour:As ShownMaterial:PlasticPackage Contents:1x Smart Digital MultimeterOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.