3D spectacles; Batteries, electric; Cameras; Computer memory devices; Electric door bells; Electronic collars to train animals; Hygrometers; Interfaces for computers; Manometers; Microphones; Photocopiers; Precision balances; Punched card machines for offices; Radios; Scanners; Smartphones; Smartwatches; Telescopes; Wearable activity trackers; Earphones and headphones; Electric sensors; Luminous pointers; Rotating lights