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I am not big on electronics between passwords and having to do thing over the net. My mother's back door lock finally broke so I thought I try one of these fancy finger print/combo/key lock. Dang man, they are cool. The finger print reading works for me 90% of the time depending if my finger tip is wet or dirty. For my kids, wife and mom, it work flawlessly. If not, there's the key pad. Man, no more having to drag keys around especially for my mother when she goes for her daily walks. I am so impressed with them, I bought three more for my own house.