It deals with a device of alert that are placed the user, a greater person, in predetermined zone of its body, and that by means of communication via radioelectric emitter emits a codified signal, or in automatic or voluntary form, when this person undergoes a problem serious unforeseen circumstance, being worth to this end of a wireless emitter and a receiver with device of telephone communication. The device counts on a physical belt that it carries the usuary person, on which registers one or several medical parameters of the state of health of the patient, who drives itself automatically in you rule pre-established, codifying the signal and carrying out the transmission of the same to a emergencia power station to decode that and signals it alert. Also the usuary account with this physical belt, a pulser of signal and an inhibitor of the same, for its voluntary operativity; as well as a device of warning of involuntary debranching and a device of warning of the user of ?estoy bien?. This destined preferably to people majors that live single and also for any person whom risk of a crisis of surprise health runs that requires an urgent medical intervention.