Okay, smart people knowing how dumb people are, have put lovely buttons on our remotes to our cars, so you can push the unlock button and see your car lights blink, or if you are really lost, hit the car panic button and follow the loud obnoxious honking.
They have put a button on your phone wall unit, so that you can find the missing handheld phone that you left on the couch, desk, etc. Just follow the beeping noise to find your phone.
If you don't remember where your cell phone is and you managed to leave it on, just dial the number and you can easily follow your ringtone to the missing device. If it is really well hidden this may require several calls.
But the digital camera.... no such device exists. Now where are you hiding precious camera with the blogging pictures?? I know you are here somewhere.