Air analysis apparatus; Batteries; Compact disc players; Earphones; Loudspeakers; Microphones; Projector lamps; Solar panels for the production of electricity; USB cables; Wireless chargers; Wireless speakers; Adapter plugs; Cabinets for loudspeakers; Gloves for protection against accidents; Measuring rulers; Rechargeable batteries; Smartphone mounts; Temperature indicators; Wearable activity trackers