Abstract: It is disclosed a device for issuing signals reflecting a state of an autonomous carrier, a dog for example. The device includes sensors, signal generators like a loudspeaker or a light source, and a processor. The sensors are adapted for sensing parameters of the carrier and for issuing outputs in accordance with the sensed parameters. The signal generators are adapted for issuing signals sensible by humans. The processor is adapted for receiving the outputs and for triggering issue of the signals by the signal generators in accordance with the received outputs. One of the sensors senses visible parameters of the animal, like a global positioning system (GPS) sensor, a tilt sensor, an acceleration meter, and a proximity sensing article. One of the sensor senses invisible parameters of that living carrier, like a temperature meter, a respiration monitor, a pulse rate meter, a skin humidity sensor, and a sniffer.