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The MPI-47E screamer is a complete and advanced range of piezo device. Patented technology provides a powerful sound output with a minimum of current consumption. This makes the piezo screamer suitable for use with many of todays control panels, even those that provide only limited power for audible devices. Unlike a conventional speaker, a piezo is a crystal type resonator, which provides a broad sound dispersion and a longer service life. Piezos emit a piercing high frequency sound, which is very intense close-up ideal for smaller houses or stores, apartments or pre-alarm applications.