Review on 🔦 LOMVUM Dual Non Contact Voltage Tester: 12V-1000V/48V-1000V Range, LED Flashlight, Alarm Mode & Live/Null Wire Judgment by Evan Austin

I work in a repair shop and got a call that the elderly person's home had no electricity. I take my NEW NCVT LOMVUM and meet my boss at the machine. I pull it out and check the main switch bare wire, the tester starts beeping and turns off. (The power had gone out due to a misunderstanding in the bill being processed and power should be restored in a few hours.) My boss opens the nearest breaker box and I check the other one which was LIVE and didn't receive anything. A few sporadic beeps from the speaker that sounded like there was a piece of rice stuck in it and a very annoying frequency. then he died. I mean when testing the 240V switch line I got green color. My boss had to get his tester Kline who was working. Now I'm worried because I also bought a LOMVUM voltage meter with NCVT and I'm embarrassed to take it out of my pocket.