Carriers adapted for mobile phones; cases adapted for mobile phones; electronic ornaments for mobile phones to indicate incoming calls; holders adapted for mobile phones; mobile phone cases; mobile phone covers; mobile phone sets; mobile phone straps; mobile phones; mobile phones for use in vehicles; control boxes for headphones; covers for headphones; headphones; headphones for audio apparatus; headphones for microphones; plug adaptors for headphones; stereo headphones; stereo headphones for personal entertainment use; stereophonic apparatus incorporating headphones for personal use; two-way plugs for headphones