The 14 mm resolution means it detects fingers reaching into the danger zone, meeting the finger-protection class per IEC 61496-1. This is the sensor you spec when a machine cell needs a defined safety zone without physical barriers.
The part ships in a box package, which is the standard retail unit for this sensor family. The series designation (*) groups this model within the F3SG-4RR family of safety light curtains, all sharing the same form factor and mounting footprint.