Battery chargers; Headphones; Global positioning system (GPS) apparatus; Wearable activity trackers; Covers for smartphones; Cases for smartphones; Protective films adapted for computer screens; Covers for tablet computers; Protective films adapted for smartphones; Virtual reality headsets; Wearable video display monitors; Laser projection virtual keyboards; Chargers for cell phones; Screen protectors for cell phones; Ring holders for cell phones; Holders adapted for cell phones and smartphon...