US Patent 11918378 Wearable child-monitor system including security screw and breakaway

Embodiments of a personal safety monitoring system this disclosure include a wristband that includes a two-way security screw having a non-standard drive recess and sized for insertion into adjustment holes of the wristband; a security key having a non-standard drive configured for insertion into the non-standard drive recess of the two-way security screw; and a designed fail point located along at least one of the first and second lengths of the wristband, the designed fail point configured to fail at a predetermined pull force on the wristband. A monitor may receive signals from the wristband and sound an alert when the wristband exceeds a maximum allowable distance from the monitor.