Audio speakers; battery packs; carrying cases, holders, protective cases and stands featuring power supply connectors, adaptors, speakers and battery charging devices, specially adapted for use with handheld digital electronic devices, namely, cell phones and headphones; cell phone battery chargers; cell phone battery chargers for use in vehicles; earphones and headphones; electronic switchers for audio and video signals; matrix switchers for audio and video signals; music headphones; USB (universal serial bus) hardware; USB hubs; wireless adapters for computers; wireless computer peripherals; wireless indoor and outdoor speakers; wireless receivers and transmitters for portable media players.