Manual push-button of alarm with indicator of functioning for conventional systems equipped with LED. The led indicates at all time the connection to the conventional zone of the head office of detection of fire and fixed ignition is kept, in case of alarm of the own push-button, until one does not proceed to the rearmament of the system. Designed and made similar norm EN54-11. Eligible resistances or dry contact and 4 terminuses to realize the connection of the same one. Mechanical device rearmable by means of key included with the push-button. Assembly in surface. Red color. Dimensions 95 x 99 x 43 mm.