ZT-E4 Outlet Tester with LCD Color Screen，3-Wire AC 120V Circuit Breaker Finder Tool,Receptacle Tester with Voltage Tester

This is an outlet tester that is a must have tells you if outlet is wired correctly just by plugging it in. Great for electrical inspections. tells you a lot. if outlet is wired wrong, GFCI is working, if there is a power leakage, and if there is power at the outlet. and how many volts. It is very accurate. I have three of them. First one I got was in December 2023 still going strong. A very handy tool to have. I have tested this with my KLEIN my AMPROBE and FLUKE Meters.

The product is a good deal for $19. It's easy to use and easy to understand test results. However, the little folded instruction sheet is in such a small font that you need a good magnifying glass to read it. The instructions say to open the back cover and insert two 1.5V AAA batteries before using. The Amazon product literature also tells you that batteries are required. The instructions and the Amazon product info neglect to mention that the two batteries already come in the product. There is NO SEPARATE BATTERY COMPARTMENT. You have to unscrew the back cover and GENTLY pull it off, as wires attach the front with the circuit board and batteries to the back cover with the wall plug. The wires are not long enough to cleanly pull the back cover out of the way of the batteries. I always read and record alkaline batteries' voltage and change them out when the voltage gets low to avoid leakage and corrosion. It's very awkward to do with this product - the wires should be longer. In trying to measure voltage for the limited distance I could remove the cover, one of my leads slipped and touched both a battery terminal and the circuit board. I thought I'd fried the circuit board. The product wouldn't turn on with the cover on again. I opened the cover and replaced the batteries. That must have rebooted the device since it's worked well after that. It's too bad for all the nifty circuit detective electronics in the Zotek device that they don't display internal AAA battery status on the lovely LCD screen; it would be even better if such an indicator displayed the AAA battery voltage. It's very awkward to have to unscrew the back cover, pry the device apart, and take the batteries out to test voltage (to avoid slippery probe accidents like the one I had). Overall, I'm very happy with my purchase. I just don't look forward to checking battery voltage. I replaced the alkaline batteries with much more expensive Energizer single-use lithium AAA batteries. They don't leak even when dead and have a 20-year shelf life. So I'll only have to open the Zotek tester when my Li AAA batteries die, but two such batteries are ~25% of the cost of the Zotek tester!

Powers on and shows proper connection, what's missing and voltage between hot - neutral and neutral - ground. Helpful info for checking all proper aspects. Also does ncv test. Just be careful of the GFCI test button.

Has a large color LCD display. YOU MUST BE MINDFUL OF ONE THING: THERE IS A GFI (GROUND FAULT INTERFACE) BUTTON, AND IF YOU PUSH IT, YOU WILL BLOW THE BREAKER ON THAT CIRCUIT! I have never pushed it, but I know what it is supposed to do. This is a great tool to have around the house to check electrical outlets.

El dispositivo funciona muy bien. Detectando cuando se presenta alguna anomalia en los contactos. He detectado polaridad Invertida, falta de tierra física, voltaje por debajo del nominal, también me indica cuando en un circuito o un cable existe voltaje con solo acercarlo y detecta SUV tener que conectar