Batteries; portable media players; walkie-talkies; wearable activity trackers; accumulators; battery chargers for mobile phones; cases for mobile phones; electronic navigational and positioning apparatus and instruments; global positioning system (GPS); hands-free kits for phones; mobile phone straps; mobile phones; sound systems comprising remote controls, amplifiers, loudspeakers and components therefor; waterproof cases for smart phones; wireless communication devices for voice, data or image transmission.