Review on TOWODE Door Stop Alarm 3-Pack - Upgraded Door Stoppers with 120 dB 🚪 Security Alarm - Perfect Gift for Travelling, Hotels, Homes, Apartments - Door Stopper Security Tools by Becky Evans

Wow! I bought these little signal wedges because I have a lot of house entrances and I felt like I needed more security. Batteries for 9 volts are not included in the kit and I warn you - they are very tight in the battery compartment. So tight, in fact, that I was concerned that one of them would rupture the battery before inserting it, so some customers may need help installing the batteries. You have 3 sensitivity settings - low, medium and high. I tested the alarm on the first one before installing it and WOW it's LOUD! I have no doubt that when it sounds everyone in the house and possibly the yard will hear it. This alarm has a loud siren alarm. Be careful when testing, it's really penetrating!