Fujitsu Bluetooth ring lets you write in the air

Fujitsu is continuing its push into wearables for the workplace with a prototype Bluetooth ring that lets users “write” in the air so they can work hands-free.The gestural device goes on the index finger and can be used to write Japanese characters, Latin letters or numbers in midair. A linked smartphone or other Bluetooth mobile device with a Fujitsu app can instantly recognize numbers written with the ring with about 95 percent accuracy, according to developer Fujitsu Laboratories.The r