I bought this because I will be hiring a van to transport things across the country and will be stopping at hotels and attractions along the way. I was afraid the van might break down at night so I wanted something that would put people off, get people's attention and I could hear in the middle of the night if it's working. What I like: - Runs on batteries. - It has a remote control to turn it on and off. (You can also toggle it on/off directly on your device.) - It's loud. - It has 2 modes: alarm clock and doorbell (e.g. when someone enters the store.) - It's light enough that you can stick a magnet on it so you can attach it to metal - The infrared sensor doesn't go through the glass , so that someone walking by the car does not turn it on. (I tested it by putting it in my car, turning it on, walking past it and going straight to the glass too.) Someone else posted a video of them installing it in their work van and that convinced me, to buy it. I put in the earbuds and tested the controls to make sure I know how they work. Even with earplugs you could tell it was loud. I took out one of the earbuds to try the "doorbell" mode and even without earbuds it was loud. So I am sure that the alarm clock will be really powerful without earbuds. Overall I am very satisfied and look forward to using it.
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