Review on SABRE Wedge Security Alarm Siren by Jamonte Hamilton

I will be traveling alone for about 2 months and bought this to feel safer in the different hotels and Airbnb I will be staying in. I received these and immediately opened the package to put the battery in and try it out. The small screw on the back cannot be removed. None of the screwdrivers I have (of which I have many) will fit. Also, the screw is now damaged and I doubt I can find a way to open it. With such an article, the correct screwdriver must be sent along. It was a waste of money and now I don't even have enough time to order something else to take away instead.