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There are still some neat integrations available with Bluetooth-only <a href="http://www.sz-cardoria.com/hotel-smart-door-locks/" target="_self">hotel smart door locks</a>, though. For instance, the August lock has an opt-in auto-unlock feature that's tied to your phone's Bluetooth. Lock your front door, leave home, then return within Bluetooth range, and your front deadbolt will automatically unlock.
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If you want to control your lock remotely, adding passcodes or letting people in while you're away, you're going to need a Z-Wave hub or Wi-Fi-connected smart lock.
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Z-Wave
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Examples: Poly-Control's Danalock (Z-Wave version), Schlage Camelot Touchscreen Deadbolt, Yale Real Living Touchscreen Z-Wave Deadbolt
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Z-Wave smart locks are available from brands like Schlage, Poly-Control and others. Unlike Bluetooth locks, Z-Wave locks don't connect directly with your phone. Instead, they'll need to connect to a Z-Wave-compatible hub. That hub will translate the lock's Z-Wave signal into something your router can understand — once it does, you'll be able to connect with your lock from anywhere.
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Samsung's SmartThings and the Wink Hub are two examples of Z-Wave control hubs. SmartThings in particular works with a bunch of third-party Z-Wave locks, from Kwikset and Poly-Control to Schlage and Yale. (Here are the complete lists of SmartThings- and Wink-compatible locks.)
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The range of a Z-Wave connection is about 120 feet, so the lock will need to be at least that close to the hub — though additional Z-Wave devices can act as range extenders by repeating the signal from the hub and sending it further. The Z-Wave signal can bounce up to four different times, for a maximum range of about 600 feet (walls, doors and other obstructions will all take a toll on range).
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Some Z-Wave locks like the Schlage Camelot Touchscreen Deadbolt ($239 at Walmart) don't offer their own app — instead the interface for the lock will pop up in the app of whatever Z-Wave hub you use. This can either leave you feeling disappointed that you don't have detailed, dedicated settings for your lock, or happy to not be downloading yet another app with yet another log-in. Again, it's all about preference here.
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Z-Wave's biggest setback is the requirement of an additional hub to talk to Wi-Fi. The plus side is that you can connect to more third-party devices than a standard Bluetooth lock — if you have SmartThings or another hub. But, if you don't plan to use a bunch of other devices in conjunction with your lock, Z-Wave may not be right for you.
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Wi-Fi is available as an optional add-on with some <a href="http://www.sz-cardoria.com/hotel-smart-door-locks/wooden-door-hotel-locks/" target="_self">wooden door hotel locks</a>. For August's line of locks, a $79 August Connect plugs into a power outlet and bridges the connection between the Bluetooth August lock and your Wi-Fi network. The same goes for the $100 Kwikset Kevo Plus. Once you've plugged in these accessory devices and made that connection, you can control your lock from anywhere with an Internet connection.
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