[Binoculars;] Dog whistles; [Earphones;] Electric fences; [Photographic cameras; Portable media players; Smartwatches; Telescopic sights; Walkie-talkies; Wearable activity trackers; ]Electronic collars to train animals [; Global positioning system (GPS) consisting of computers, computer software, transmitters, receivers, and network interface devices; Lifesaving vests for use by dogs; Sighting telescopes for firearms]