Locky
Locky is a smart attachment for door keys. Using its app, you can find where your keys are and also monitor if you locked or unlocked your door. You can also get multiple Lockys and a beacon to monitor multiple doors at once on the app.
Crowdfunded projects pose a degree of risk for buyers, so be sure to do your research and fully read the seller's detailed description and production plans before plunking down your hard-earned money.
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