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Home Tech Smart Phones Hold the Keys to Front Doors Knock, knock. Who's there? A brand-new generation of hardware and app combos that let you play doorman from anywhere Follow Mike Elgan I'm a Silicon Valley-based writer, columnist and blogger, covering technology... More » 21 Bookmark Email Embed Click "Embed" to display an article on your own website or blog. Share: The smart phone has become the mother of all electronic devices for one very simple reason: You always have it with you. And that's why a phone is a great place to put all the stuff related to your door. For example, you can virtualize the key, the peephole, the doorbell and other elements of the door, and put everything on your phone to be used from anywhere over the Internet. There are major advantages for doing this (besides laziness). For example, you can send a key via email to unlock your door. You can hear knocks on the door or the ringing of the doorbell even when you're not at home. And you can see who's there even when you're not. Three new products take electronic door stuff to the next level. All of them are crowd-funded projects still in development. But if everything goes according to plan, you'll ...
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The Cobra Tag Universal is a Bluetooth device you can use as a keychain, and it comes with an app for your iPhone or Android phone. You can also attach it to your remote control or any other household object. When you press a virtual button in the app, the keychain device beeps loudly. And the reverse also works: If you press an actual button on the keychain, your phone makes a loud beep.
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