Product review (5 stars): This little bundle of technology works!
They have to be kidding, right?  $25 buys you a motion detector that will actually play mp3 audio you record when something moves in front of it?  You bet your butt it does!  Take your time, follow the instructions, and in no time you will be recording mp3 files onto the micro sd card they provide (which works just fine and is not loaded with malware despite fears of other reviewers).  Then you put some batteries in the unit, plug in the micro sd card and record the files to internal storage.  Boom -- you're done.  Turn it on, move in front of it, and listen to your mp3 files.  We have a rabbit problem -- they're eating up our yard.  Hope they enjoy the fox cries tonight!

Update:  Custom weather proof installation works flawlessly (see photo).  Noticeable decrease in rabbit poop.