The new Wii Vitality Sensor was vaguely introduced at E3 2009. The device attaches to the Wiimote and clips onto a players finger to read their pulse, for unknown reasons. Nintendo of America president Reggie Fils-Aime said that Nintendo plans on expanding on the device at E3 2010 and showing it with compatible software.

“We will show off the Vitality Sensor with software [at the show]. I’m not going to give you any more hints beyond that.”

The mystery will remain until the kickoff the show which is taking place June 15-17. Nintendo also has some other “surprises” planned for the next E3 involving a new Zelda game for Wii.