With HT Automatic Digital Multimeter's Mode, you can quickly switch between all measurement tasks, including AC voltage, resistance and continuity, without having to select a mode or range. It makes measurement work easy, fast and accurate Digital Multimeter Completely safe voltage-free 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 potential You can use the TM-510 digital multimeter to intelligently measure voltage on AC power lines without connecting cables, making wiring troubleshooting much easier Has passed and RoHS certification. Overload protection measures are incorporated inside the instrument to improve the product's safety performance and maximize user safety. The electrical automatic digital multimeter supports data retention, automatic power off, low battery indicator, backlit display and flashlight functions. All these convenient features make this instrument suitable for daily use by hobbyists, car owners and homeowners. Simple and easy to use, enjoy endless fun. Voltage: 0.8-600V (: 610V)AC Resistance: 600k Counting: 2,000 counts NCV: Yes Display with gear box: Yes Data retention: Yes Backlight: Yes Light: Yes Low Indication: Yes Auto power off: Yes Material: ABS Power layer: 2x1.5V AAA (not included) How to use: Step 1. Remove the rubber cover on the back of the multimeter, open the battery cover and insert 2 AAA batteries into the battery compartment according to the polarity markings. Replace the battery cover. . Turn on the multimeter, insert the test leads according to the instructions, 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 to be measured. The multimeter measures automatically without user selection. Notes: If you want to use the NCV function, you do not need to use test leads. Color: As shown Material: Plastic Package Contents: 1x Smart Digital Multimeter Only the above package contents, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.