Power Failure Alarm, CN Plug 220V LED Indicator Smart 120db Automatic Power Cut Failure Outage Alarm Warning Siren, Outlet Alarm Power Loss, High voltage design

great product

It's an alarm - It works. The power alarm on my oxygen concentrator was barely audible. This little voltage alarm will wake up the dead!!! Simple, no power, lots of noise. Gives me time to grab an oxygen tank and correct the problem. Well worth the money.

Similar to other devices advertised for more. Works for 110V. May want to put duct tape around it to reduce sound a bit.— Update —-It draws too much current and battery dies within months. Both times power failed , it didn’t sound as battery was already dead. I have discarded this device for now. May make my own someday based on relay that will only draw power from battery when power fails.

Nice to buy something that works right off the bat when you plug it in. No messy instructions, just plug and play.

They both looked re-packaged and the boxes we're not in good shape. I received the first one which didn't work so I sent it back for a replacement. That one didn't work either.

Clearly the product box was reaped and sent back out with inspection. The battery clip that connects the 2 battery's in the sliding lid is missing. So I can't get a connection.

Ordered the first one, it did not work Returned that one and reordered a second. The second one did not work either and was returned. Concept is good but so cheaply built.

I am using it for a power failure alarm for my freezer. Lots of expensive meat that I cannot afford to lose.It’s very loud. I plugged it up to another outlet on the same circuit. Flipped the breaker and damn, that thing is loud.Perfect!