The D201RQ / MP3 master clock is primarily used as a music 
school ring through the radio, automatic broadcast of announcements 
and advertisements, fire or evacuation announcements by launching a designated MP3 recording from an SD 
memory card. The solution is also switching on radio. It is designed for schools, 
manufacturing companies, department stores, churches (chiming, bells), 
sports halls and stadiums, swimming pools, etc.