That early-morning scramble to find your keys before you leave the house doesn't have to be so frantic if you've got a wireless key finder handy. No bigger than a standard key chain — and even smaller, in some cases — these dongles pair with your smartphone to act as proximity sensors, alerting you when your keys are nearby or in danger of being left behind. And with these sensors now using lower-powered Bluetooth LE to connect to your phone, you needn't worry about your occasional bouts of forgetfulness draining your phone's battery.

Plenty of key finders promise to keep your valuables close at hand, but after putting a variety of devices through their paces, the second-generation Tile emerged as the best choice for tracking the whereabouts of your keys, by improving its range and adding features like two-way finding capabilities. Our runners-up were the Duet by Protag, which packs its feature set into a compact design.

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