The joke's on me!

I kind of played a practical joke on myself a couple days ago.
For the past couple days, I’ve been hearing a soft beeping noise coming from somewhere in my bedroom. Not like the smoke alarm, this one’s much softer and much less frequent.
One of my nephews is preparing to graduate from High School and getting ready to live out on his own, so I bought him an alarm clock. The clock has a special feature in the form of a built-in battery backup in case the power goes out. (It’s about time someone did that! I’ve wanted that feature for several years.)
I heard the beeping again this morning and finally tracked it down. It’s coming from the wrapped package containing the alarm clock. (I never opened the box, it must have been doing this at the store too!)
Can you imagine the chaos if a wrapped package at the post office started beeping?