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We spend about a $145 million per year on policing. What if instead of spending a huge chunk of money on cameras which go obsolete after a few years we invest in cameras that will last a long time putting less strain on the cities budget.

What to do if you get locked out of your apartment/ unit/ house. 

This is based upon the CS3651 (South Korea) 

Weiser/ Kwickset (Behind the rubber gasket/cap) (North America)

Milre: MI-350K (South Korea)

Some of the cheaper models tend not to have a low battery indicator. They either die or the battery gets so weak that there is insufficient torque to pull the throw (Protruded section when locked).

Why do some home builders place electrical outlets in random places for the sole purpose of making inspectors happy? The end users assume that outlets cannot be placed elsewhere and that there are no user friendly options for outlets in the market.