Does this one beep when voltage is detected, or just light up?
1878162
Yes. It beeps. Plus it beeps faster (and blinks faster) with a stronger field. The adjustment for sensitivity is also better than other comparably priced brands. The other brands I tried had poor sensitivity, and some with push button on, you basically could not tell it they were even on half the time. The GreenLee GT-16 is the best one of several I tried. And I use it often.
1878163
It is supposed to beep and it does......at times. I had an incident with mine where it beeped on 110v and then didn't on 440v then did again on the 110v. I don't know why it didn't detect the 440 when it tested OK on 110. I would not recommend this product.
2164306
Same as if you were plugging it in to charge. If your volume is on it will make the charging beep and light up red. When you remove it no noise.
242485
Not sure on this one. The one I replaced did beep when the sensor went bad and it was the same manufacture.
170405
The one I bought did not work and shipping it back to a third-party seller cost money, so it still sits here to see if I can get it to work. But I had an identical one for years before and a red light blinked on the bottom face of it. There was no beep, I'm sure.
1047320
Even the LED lights up or make a beep ... The most common error in installation: batteries are NOT placed correctly. Please check the +/- marking carefully for ALL FOUR batteries. Please visit our website for more FAQ.
123915
Yes it lights up, when the power is on, and is easy to read the time. Inexpensive and dependable, does the job.
419859
My brand new one doesn't seem to beep at all, and the instruction book only says that it will "flash", meaning tiny black things blink on and off, that can barely be seen. I'm very puzzled by this, as previous reviewers said that it beeped. I suppose they changed the model. I note that Amazon's product information only says it gives you "alerts". I assumed that meant audible, but it doesn't actually say so. I hope someone can shed some light on this!
1493857
Mine beeps with most batteries, but for very small UPS battery, sometimes the beep seems to be missing. Overall, the tester works great and I found it easy to use.
29069
I think you meant after the door is OPEN??? There garage unit will continue to beep but apparent that's not an option with their door unit. Not sure if this one has a 12V output or not. I have been looking at every unit on Amazon but no one makes a continuously beeping while open door unit that is not 100 decibels or louder which will not work for a door you actually use daily.
34855
When it is functioning correctly, it simply beeps when time is up. Optionally, one can set the unit to be silent and/or optionally blink the user lights when time is up. Warning: this unit uses a cheap wiring inside which leads to the unit eventually resetting itself after moderate use. I have two of them, and they both have the same problem, so I don't recommend it.
1657884
On my tester, it will either light up or not, might be a loose connector be sure and check the leads into the the plastic 20pin connector, that they are all seated and the female connectors are not spread out..
1649688
No it does not beep, but for a quick second you can hear the electronic mechanism that unlocks the latch and it is not very loud. There are 3 lights on top by the fingerprint sensor that change color after you swipe your finger to let you visually see if it has been accepted and help you see it in complete darkness.
2066752
I haven't noticed any beeping when I've used it. If it did, it wasn't noticeable.
843590
It will make a beeping noise once the battery is going dead. If you plug it up to the charger - the beeping should stop.
1977119
mine beeps immediately and the screen glows blue. check your batteries and make sure all are in correctly.
1895320
It doesn't light up and it is a very loud beep that sounds for each minute increment that is set and beeps for about a minute when time is reached. I can hear it clear across the house.
2067271
One beep is on,2 off. I beleive if you press button briefly it will set that sound.