Noopel Glass Break Alarm 5 Pack, 125DB Loud Window Vibration Sensor, Burglar Intruder Entry Alert for Indoor Home Office Security

Ok. I have 3 very large windows that my cats tend to watch out at all hours. tTherefore,the curtains are never drawn. But the backyard is very dark and given the large oak tree it's very hard to put in any kind of solar lights. In the same room is a side door that is never used with a glass window on it and next to that is a laundry room with a window behind the washer and dryer. So I thought it would be a great idea to purchase these five alarms. My backyard and side yard are really dark, and I did get some motion sensor lights, but given the size of the large trees nearby not all areas are covered. I still have high concerns over the constantly opened curtains that attach to these huge windows. I also of course have concerns with the two entrances through the side that are completely dark all the time.Two days ago I tested each of the five alarms and found they were really loud which is wonderful because my room is across the house. I turned the volume down as low as I could and I stuck each of these to the three Windows, the door,and the window behind my washer and dryer.I gave it a test. I bumped the window and it chirped. I waited a minute and bumped the window again and the alarm ring. Very loud even at the lowest setting but I was quickly able to turn it off with the little switch on the side.I'm a totally happy customer at this point...Fast forward 48 hours I'm washing a few dishes and I set something in my over the sink dish drainer and accidentally knock off the rack that holds one single glass bottle.The very thick glass bottle falls, lands in the bottom of the sink.the alarm on the window for this to my left and the alarm on the window for this to my right both sound.It is loud. My house is tile and concrete. It is loud.Fortunately the alarms flash red when they are the one that is triggered so it was very easy to identify that you making the noise and flip the black switch on the side which was easy to find in the dark and turn them off immediately.My bottle was not broken.My cat's fled the sceneMy dog alerted at the window in question that he was able to seeThe alarms were loud enough to wake my adult son from a sound sleep in the room down the hallAnd I was easily able to rectify the noise by identifying the alarms and flipping the switch.All in all, I'm extremely happy because my biggest concern was number one hearing the intrusion and number two my formerly feral cats running from the source of the intrusion so that they remain within the home and not get lost.I love these. They are absolutely perfect

貼り付けていた窓を忘れて大音量が流れてもすぐ止められる。そして窓を閉めてリセットしてスイッチを入れるとピッと鳴ってセットされた音がする。この間が絶妙にいいと思う。

LOL, they work and scare my granddaughter and dog. Easy to install, placed one on my granddaughter window. She decided to slam up against the wall and the vibration made the alarm go off; very loud, should scare anyone away. Sensitive device, so any hard vibration will set it off.

Very loud but i am coming back to this review about 4 months later and 3/5 of them are dead already. Changing battery’s didn’t work. They just stopped working and don’t know why. Don’t buy these

I really like that you can adjust the sensitivity, they really work if you've got anybody prowling around knocking on your windows or whatever this will definitely scare them away