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"Lockitron has just outed a new cellphone-controlled keyless entry system, sporting a raft of new bells and wireless whistles. The WiFi-connected product mounts over your existing deadbolt \"in seconds,\" according to the company, and lets you or those you trust control your lock from anywhere in the world by SMS or the internet. You can also unlock your door in person without lifting a finger if you have an iPhone 4S or 5, as the Lockitron will sense your approach using Bluetooth 4.0 -- a feature that may extend to NFC and Android devices in the future, too. To top it off, the system can notify you when a friend or relative returns home, and it has a knock sensor to let you know if someone's come by to visit. Lockitron exceeded its self-imposed minimum order limit by 250 percent in less than a day, so if you'd like to pre-order one at the current $149 price and get it for March 2013, hit the source."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.engadget.com/2012/10/03/lockitron-launches-iphone-controlled-keyless-entry-system/?ncid=rss_semi>