Personal security alarms; Personal security alarms that connect to a wireless communications network; Personal security alarms that include self-defense measures; Personal security alarms with self-defense measures that connect to a wireless communications network; Security alarms.; A personal safety device, namely, an instrument, which can be attached to a user, providing multiple levels of personal protection, including audio and/or visual alarms and defensive measures, as well as notification, messaging, and GPS tracking, via wireless communication with a user's smartphone, to authorities and/or personal contacts; A modular, interconnected set of personal safety and security devices includes monitoring devices, web-based software, mobile apps and wearable devices that can activate audio and/or visual alarms and defensive measures and emergency notification, messaging and GPS tracking to authorities and personal contacts via wireless communication with a user’s smartphone