Thanks, guys! I like your ideas about guns and dogs. Sound very protective, but, unfortunately, I am not sure it suits me. My little doggy is more likely to open the door to the burglars than to protect myself. She is too friendly. Guns are illegal in the UK, so, I need to do a hard job to find them without a license. Anyway, when I am out, the gun could not shut by itself, lol. I have called Ajax and mentioned the comment from DDE, they laughed. Said it works perfectly, by the way. So, I think it would be better than a gun or a dog! Thank you!