Random devices showing up

i had 4 smartsense motion detectors show up randomly in my dashboard and cant not figure out what they are associated to.

SmartSense Motion SmartSense Motion 15FA INACTIVE 3 days ago
SmartSense Motion SmartSense Motion AEDC INACTIVE 3 days ago
SmartSense Motion SmartSense Motion E599 INACTIVE 3 days ago
SmartSense Motion SmartSense Motion BA8C INACTIVE 3 days ago

any ideas how they got there ?