Originally Posted by
RChung
It has a barometric altimeter and a multi-axis accelerometer (so essentially it has an inclinometer). It doesn't have a built-in speed or cadence sensor; you can link those if you have them.
The idea and theory of these devices is solid; I use the same principles myself. In practice, the implementation of the theory to an actual product is less happy.
So, if I were to toss a bike out of a skydiving plane, it would see acceleration and a change in barometric pressure, along with an increase in wind speed, and read power without me actually being on the bike, pedaling?