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One arrived crushed, didn't work. The others are loud but the key ring fell off another one and they are flimsy. Had hooked up another to the car door and seatbelt as a secondary car alarm after many break ins and not only did it not deter, by the next morning it with the pin still out from a break in, it no longer worked.
Not loud enough to draw attention in an urban environment, and easily tolerable by a potential offender before forcefully removing the device from whoever is carrying it. I’m not sure if it will do more harm than good.
I would not recommend relying on the device, as it will give anyone carrying it a false sense of security.
The first one out of the box did not work at all. I tried to change battery, etc. and nothing. I tried the others and they seemed to work well. When the first one did not work, I was skeptical regarding the rest. For peace of mind, wish all of them would have worked.
I distributed 5 of these as Christmas gifts to my daughters, wife and granddaughters. I can only rate it a 3 because they haven't been tested buy I'm willing to trust them as advertised. I like that the batteries can be replaced, they are assorted colors and are handy to attach to about anything.
I was disappointed that the alarms was not pack in separate boxes. These were for Christmas gifts. Also there was only one paper instruction. I will have to make several copies of the instructions for each alarm. But the alarms are loud and lights works. I also the like the colors of the alarms.