Remotely-controlled sub-aquatic video camera containing a TV camera, transmitter, receiver and microphone to record, detect, measure, survey and locate objects underwater; GPS navigation device; Surveying instruments; Gas testing instruments; Non-electric wall stud finders; Electric bark control dog collars featuring citronella spray, static electricity; Endoscopic equipment for industrial purposes; Optical apparatus and instruments, namely, optical ports for underwater photography, dome port...