There is a high demand for public address system in Osram. These systems are used for the transmission of voice, music or alarm. They are used widely in railway stations, airports, hospitals, emergency care units, shopping centres and schools. The PA systems used for concerts tend to be more powerful compared to the normal ones. While buying the public address systems, some of the aspects that should be kept in mind are: capacity, area of reach, durability, sound clarity and service life. Some of the aspects that influence the purchase of public address systems are brand name, durability, warranty and support services.