The system presented in this work is intended to be used by women who live with the domestic aggressor and therefore do not have a restraining order or judicial mechanisms that can protect them. It is based on the use of small wireless electronic devices, using a Bluetooth connection to send a message to a smartphone. One of the main features of the device is that it can be hidden in different accessories of the victims, such as brooches, necklaces, watches, bracelets, and belts. In this way, it can be customized according to the victim\'s personal preferences so that it can go completely unnoticed by the perpetrator. Besides, an application developed in Android and iOS is responsible for transmitting the alarm message to a central server, along with the GPS geolocation and the victim\'s identifier. A web service is run on the server that manages the entire alert system and, if necessary, notifies the police or protection services of this emergency. Several designs of electronic devices with panic button have been developed, along with the applications for the mobile phone and the programming of the web server.
Part of the book: An International Collection of Multidisciplinary Approaches to Violence and Aggression