This is a set of the Panasonic siren amplifier WF-115MA. Set Contents: Siren amplifier main unit, microphone WM-274LB, microphone holder, instruction manual, separate horn WF-760, driver unit WF-D50 These are the 6 items. The amplifier is in good condition, the microphone has minor scratches, and the horn and driver unit have scratches and dirt. The amplifier's power has been confirmed, so sound output should be possible.