While most sane people usually get a strong and robust safe to keep important belongings away from others, there can be other insane people that use a wall clock with a “hidden” compartment. It looks so cheap and normal that I bet thieves will not want to steal it.

Store jewelry, cash, passports and other important documents.

It needs 1AA battery to work and costs $20.

Via GadgetoMetro

PS - The clock really works.