A 23-year-old entrepreneur at Kochi’s Startup Village will be the youngest speaker at the prestigious World Mobile Congress to be held in Barcelona, Spain, on February 24-27. Rohildev N, the founder and CEO of RHL Vision Technologies – which invented ‘Fin,’ a silica finger-ring that can remote control an array of devices such as car stereo, TV and electronic gates – will be rubbing shoulders with the top guns in the mobile technology field, said a press release from Startup Village.