Clearly: 5 stars! From my fellow commentators already described in detail here, I would like to respond to a detail, what has not been mentioned: I run with iPhone and runtastic app which the pulse signal gets through Bluetooth connection from the fuse. The runtastic app, but also all other running apps have excellent recording and diverse evaluation options including .. heart rate (pulse) then from the Fuse. Now I use more for my triathlon training a Garmin 920XT which the pulse signal, however + brings about the wireless standard ANT ... and what can I say - the Fuse can simultaneously both specifically. So now I draw with the Garmin in parallel and did so a second evaluation exciting opportunity with diverse display options. I know of no chest strap or other heart rate monitor that can also! In order for the running training and cycling once again makes so fun - highly recommended!