An employee uses a Laser Head Set (LHS) to test an audio-visual headphone system in the Fujitsu Ltd. pavilion at the Mobile World Congress in Barcelona, Spain, on Wednesday, Feb. 27, 2013. The Mobile World Congress, where 1,500 exhibitors converge to discuss the future of wireless communication, is a global showcase for the mobile technology industry and runs from Feb. 25 through Feb. 28. Photographer: Simon Dawson/Bloomberg via Getty Images