I'm not one to write reviews. However, I decided to do so because I'm DEFINITELY pleased with my purchase. I'm a single female who lives in an apartment. For some reason, this complex only has one lock on the front door. In other apartments that I've lived in, there's always been a doorknob lock plus a deadbolt lock. But not here. So, I've been a little uneasy, especially at night, since I moved in 3 months ago. Not any more, I sleep like a baby and feel very safe. This alarm was easy to install, will scare away any intruder, and was the right price for my budget. Thank you for this product.