The bluetooth enabled basic stamp has 8 input or output connections for sensors. More than enough for cadence and power sensors and as the basic stamp is programmable it's easily adapted to any manufacturer's sensors. This allows reusing your current hardware. As for the phone showing these functions, thats in the software. You would simply purchase the software package for your smart phone/mobile device or PDA along with the hardware. You would select these features from your phones menu working the same as bringing up the phones camera or dialing menu. You would simply select the bicycle icon and all sensors connected to the bikes microprocessor would be displayed along with a moving map background like wallpaper.