it is my pleasure -- and pagers efore oubefore our event. it is my pleasure -- i had the opportunity to meet the romney's a few ago. it is my honor to introduce them. good luck and welcome back to new hampshire. >> i will just take it. oh, gosh. it is great to actually start this process again and to be in a place where we feel it is an extraordinary thing that happens in new hampshire, where people really do get to know the candidates on a personal level. so, some familiar faces in the audience, and some cases we have seen before. you all know mitt announced yesterday. [applause] announced yesterday. [applause] we are in this to win it. [applause] we are also in it for a very important reason. and an important reason why i encouraged him to run and why i am so supportive of him. i tell you, i love my children, they are great, but i love my grandchildren more. my children will be ok, this economy is tough now but i am not that worried about my children. i am extremely worried about my grandchildren and their future. and their ability to have

>> well, thank you efor invitin me.special, because it not only reflects your physical appearance, but your health indicator and the principle behind this is to use light to measure volumetric changes in the body. so think of the heart as a muscle that pumps blood and when it beats it introduces more blood into the vessels which causes it to expand slightly and blood absorbs light, so that the additional volume of blood requires more light to be absorbed and less let off, so using a simple camera we can pick up the changes of intensity every time that your heart beats. >> how accurate is it? >> well, it is quite accurate within three beats per minute compared to a commercial device. >> do you think that one day it might test other vital signs? >> yeah, we have worked on other vital signs. right now we know we can measure the breathing rate and something called heart rate variability which is a index of the autonomic system, and other parameters such as oxygen saturation and blood pressure. >> ming, it sounds great. i'm