I purchased 3 of these units and 1 of the SVB 500 units because we have guns and small grandchildren. I set them up per the instruction manual and had my one year old grandson try and open it, guess what? he opened it right up. I contacted this site for fear that maybe I had set them up incorrectly, I left several messages and NO ONE called me back or contacted me back in any way. I wished I would not have thrown all the boxes away as I would send them back. Please do not buy these with hopes of keeping your family safe, they do not work. There could be a tragic outcome and a real liability issue.
This review was written in the old system and had content requirements that are different than reviews written today.