Computers; computer peripheral devices; computer keyboards; data processing equipment, namely couplers; headphones; galvanic cells; computer storage standby power supply; hands free kits for phones; protective sleeves for tablet computers; remote control apparatus; computers for students; mobile phone protective sleeves; computer peripherals; wireless headsets for use with mobile telephones; battery chargers; loudspeakers; sound transmitting apparatus; megaphones; holders for mobile phones; stylus for touch screens; electronic writing boards