Binoculars; Digital video cameras; Earphones and headphones; Field-glasses; Headphones; Hunting binoculars; IP (Internet protocol) cameras; Rifle scopes; Sighting telescopes for firearms; Smart watches; Tablet computer; Telescopes; Vehicle radios; Video cameras; Wearable cameras; Webcams; Wireless computer peripherals; Wireless ear buds; Wireless headsets for smartphones; Wireless indoor and outdoor speakers