This is a cheap pedometer.  I can't speak for how well it works because it broke less than 10 minutes after I opened it.  Setting it up was relatively easy.  There are no labels on the casing.  So once it was clipped shut, I had no way as easily identifying which side to open from.  Sure enough, I opened up the wrong side and exposed circuitry.  I snapped it back shut, but now it doesn't work.