Abstract: A wearable personal safety device includes a housing unit having skin contact and including a radio frequency transponder configured to receive, from a mobile communication device, an initiating signal including a unique user identifier and establish a connection therewith, the transponder being configured to detect biometric and physiological parameter values of the skin, memory configured to store data indicative of the detected biometric and physiological parameter values, a rechargeable battery, and a processor configured to, in response to one of the detected biometric and physiological parameter values not meeting a corresponding threshold, cause the transponder to send to the communication device a request, including the unique identifier, to issue a personal emergency alert.