This customer wanted a YourBell placed by the stock room door. They were having problems with uninvited guests and wanted to be notified when the door opened. We supplied them with the DYB2001 and a magnetic reed relay switch. There were problems with mounting the switch due to location of the door to the door jam. We designed a motion sensor ( to be released soon ) that mounted to the bottom of the YourBell. The customer was so pleased with the results that they ordered one for the entry to their store. Now every time a person walks in to the store one of the many sound files will play. This has helped to differentiate their store from others in the community.