Describe With the HT123 Automatic Digital Multimeter's Smart Auto 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 accurate Digital Multimeter Completely safe non-contact voltage testing with visual and audible alarms; a time-saving and safe feature.Digital Multimeter External Silicone Cover protects automatic digital multimeters from damage and potential electric shock You can use the digital multimeter to intelligently measure voltage on AC power lines without connecting wires, making line troubleshooting much easier Has passed CE and RoHS certification. Overload protection measures are adopted inside the instrument to improve the safety performance of the product and maximize user safety. 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 DIY fun Specification: voltage: 0.8-600V (: 610V) AC voltage: 0.8600V (:610V) Resistance: 600kΩ Count: 2,000 counts NCV: Yes Display with gear display: Yes Data retention: Yes Backlight: Yes Light: Yes Low Indication: Yes Auto Power Off: Yes Material: ABS Power Layer: 2*1.5V AAA (not included) Product size: 122*61*29mm/4.81*2.40*1.14 inches Package size: 14.5*9.5*4.1cm/5.71*3.74*1.61 inches packing list: 1*Multimeter 1 * test line 1*Manual 1*cloth bag 1*Multimeter pen 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 batteries into the battery compartment according to the polarity marks. Replace the battery cover. Step 2. 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. Due to light and screen differences, the color of the item may be slightly different from the picture. Please allow for slight deviations in measurements and make sure you don't mind before ordering.