Initially totally convinced, it is now barely in use. Did they still as a keychain, but now has a loose connection. (Litter from third floor on turf). The luminosity is phenomenal, but unlike annoying to a larger model in the long term. The real No Go are the 4 button cells that it needs. So not bad for the move, the emergency (if she goes to). Batteries should be changed every 6months. Environmental sin?!, I find. Then rather what clever.