Includes accidental touch by holding the power button for 10 seconds to confirm shutdown, and auto shutdown after 5 minutes of inactivity to conserve battery life The HT95A electrical tester features intelligent sensing technology to safely check voltages without direct with wires or live parts, ensuring user during electrical work With compact dimensions and ABS construction, this voltages tester is easy to carry in tool bags, ideal for electricians needing mobility Suitable for home repairs, professional electrical work, and circuit maintenance, featuring red backlight + buzzer alarm and operating in 0℃~40℃ environments When measuring voltages, the measurement data is locked on the LCD two color backlit screen after releasing the button, allowing easy viewing and of results, Manufacturer: Oxxggkao