Hygrometers; Multimedia projectors; Wireless speakers; Pocket translators; Wearable activity trackers; Infrared detectors; Ultrasonic object detectors for use on vehicles; Ultrasound inspection devices for non-medical, non-destructive testing; Loudspeakers, headphones, microphones and CD players; Augmented reality headsets; Night vision goggles; Game headphones; Portable media players; Lenses for cellular phone cameras; Personal security alarms; Security cameras; Rechargeable electric batteri...