Auto Function: Portable Digital Multimeter automatically turns off 15 minutes after being powered on.It must be turned off and then turned back on to continue power.When the battery is low, the indicator light will turn off. Large LCD Screen: Automatic Digital Multimeter has a large backlit LCD screen, which can be clearly seen from different angles.Practical reading tool, easy to read the displayed value, suitable for laboratories and factories. Non-Slip Support: Professional Electrical Tester protective cover of the multimeter is made of orange plastic, non-slip and slightly flexible.To prevent drops and small bumps, you can hold the pop-up stand at a 45 degree angle so you can easily see the screen. Wide Use of Multimeter: The voltmeter can be used as an ammeter, the ohmmeter voltmeter can measure AC/DC voltage and current, resistance, capacitance, frequency, temperature, diode and continuity test,transistor test.to meet your various needs. Quality Assurance: Professional Digital Multimeters have a 100% satisfaction guarantee.If for any reason you are not satisfied, please contact us.We are responsible for replacement or refund.