Suitable for home repairs , professional electrical work , and circuit maintenance , featuring red backlight + buzzer alarm and operating in 0℃~40℃ environments 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 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: ERRORY