A non-invasive, wireless, portable device for application on the finger in order to reduce the risk of sudden infant death syndrome and the risk of apnea, slower heart rate, and heart arrest in all age groups, comprising: a) a pulse oximeter block section comprising a sensor delivering blood oxygen saturation measurement signal and a heart rate measurement signal, and a pair of metal electrodes, the sensor comprising a blood oxygen saturation sensor and a heart rate meter; b) a power supply; c) means for setting threshold values for blood oxygen saturation and heart rate; d) a control and alarm-generating circuit, wherein said control and alarm-generating circuit is designed to receive said blood oxygen saturation measurement signal and to compare it with a blood oxygen saturation threshold value predefined by the user and generate a stimulation signal if said blood oxygen saturation signal falls below said blood oxygen saturation threshold, wherein said control and alarm-generating circuit is designed to also receive said heart rate measurement signal and compare it with a heart rate threshold value predefined by the user and generate said stimulation signal if said heart rate signal falls below said heart rate threshold; e) an electric stimulation generator designed to receive said stimulation signal from said control and alarm measurement circuit and, upon receiving the stimulation signal, to generate an electric signal that is connected to said pair of electrodes to apply a stimulus to the user; characterized in that: the device is contained inside a cap which, in turn, is attached to a user glove, and the pulse oximeter block section further comprises a pulse oximeter measurement and display driver circuit and a measurement result display, said cap having a transparent area made of plastic material to allow seeing the display on the device and said electrical stimulus being applied to the finger of the user. a) a pulse oximeter block section comprising a sensor delivering blood oxygen saturation measurement signal and a heart rate measurement signal, and a pair of metal electrodes, the sensor comprising a blood oxygen saturation sensor and a heart rate meter; b) a power supply; c) means for setting threshold values for blood oxygen saturation and heart rate; d) a control and alarm-generating circuit, wherein said control and alarm-generating circuit is designed to receive said blood oxygen saturation measurement signal and to compare it with a blood oxygen saturation threshold value predefined by the user and generate a stimulation signal if said blood oxygen saturation signal falls below said blood oxygen saturation threshold, wherein said control and alarm-generating circuit is designed to also receive said heart rate measurement signal and compare it with a heart rate threshold value predefined by the user and generate said stimulation signal if said heart rate signal falls below said heart rate threshold; e) an electric stimulation generator designed to receive said stimulation signal from said control and alarm measurement circuit and, upon receiving the stimulation signal, to generate an electric signal that is connected to said pair of electrodes to apply a stimulus to the user; the device is contained inside a cap which, in turn, is attached to a user glove, and the pulse oximeter block section further comprises a pulse oximeter measurement and display driver circuit and a measurement result display, said cap having a transparent area made of plastic material to allow seeing the display on the device and said electrical stimulus being applied to the finger of the user.