[ Amplifiers; Battery chargers; Cabinets for loudspeakers; Cell phone cases; Computer mouse, namely, trackballs; Display screen protectors for providing shade and privacy specially adapted to electronic devices, namely, laptops, cell phones, personal digital assistants; Electric door bells; Global positioning system (GPS) apparatus; Headphones; Holders for electric coils; Multimedia projectors; Selfie sticks; Slide projectors; ] Smart watches [ ; Smartphones; Virtual reality headsets; Compute...