Air analysis apparatus; Couplings, electric; Electric connections and connectors; Headsets for mobile telephones; Headsets for telephones; Headsets for use with computers; Portable media players; Protective films adapted for smartphones; Rechargeable batteries; Rechargeable electric batteries; Smartphones; Smartwatches; Telephone wires; Telescopes; Theft alarms; USB cables; Video screens; Alarm monitoring systems; Baby monitors; Computer monitors; Data processing equipment, namely, couplers; ...