Binoculars; Cameras; Fire and smoke detectors; Infrared detectors; Infrared sensors; Optical apparatus and instruments, namely, optical ports for underwater photography, dome ports for underwater photography, wet diopters, adapter lenses for underwater photography; Parking sensors for vehicles; Security surveillance robots; Sighting telescopes for firearms; Surveying instruments; Telescopes; Thermal imaging cameras; Video monitors; Wearable video display monitors