Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Design Flaw

In order to turn on the unit one must unscrew the plastic screw and remove the back of the device. The on / off switch is located with the batteries. Furthermore you will need to unsnap the plastic stand in order to get to the screw and open the battery panel - EVERY TIME YOU WANT TO TURN IT ON OR OFF. Very frustrating and I quickly lost the screw to the battery panel.