The SMA-500PR 500W Mixer Amplifier is a highly cost-efficient model for public address systems which is used in large meeting rooms, shops, factories, mosques etc where broadcasting paging and background music needs to be provided. More reliable than other models, this Mixer Amplifier does not compromise on features such as priority and flexibility. . It is easy to use with modern state of the art features like priority function, volume control, chime function, etc. It supports 5-zones with individual volume controls of each zone.