gyrometers; computer stands specially designed for holding a computer, printer and accessories; cell phone holders; balancing apparatus; electrophoresis apparatus, not for medical purposes; dashboard mats adapted for holding cell phones and smartphones; spirit levels; tripods for surveying apparatus; computer mice and trackballs; multifunction keyboards for computers; selfie sticks [hand-held monopods]; accessories for karaoke machines, namely, microphones, amplifiers and speakers; scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signaling, checking [supervision], lifesaving and teaching apparatus and instruments