Sound suppression devices, including sound suppression devices using active and/or passive sound suppression; ear muffs in the form of headphones or earphones; ear plugs; sound enhancement devices, including sound enhancement devices when combined with, or incorporated into, any of the aforestated goods; electronics modules, including electronics modules incorporating battery packs, and including electronics modules when combined with, or incorporated into, any of the aforestated goods; telecommunications devices and systems, including wireless telecommunications devices and connectors for the connection of telecommunications devices, and including telecommunications devices and systems when combined with, or incorporated into, any of the aforestated goods; software; parts, fittings and accessories for any of the aforestated goods