Sunday, 17 July 2011

Door opens with your secret knock

Have you ever seen a door responding to knock. Here is the device which makes door to respond to your door knocks. You are wrong if you think door opens for any type of knocks. Using this device, you need to program couple of sequence of knocks. Don't forget to remember the knocks sequence and tempo of the knocks, if you miss, then you can't enter your house :). For more details click here.

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