CATEYE CC-PA400B PADRONE DIGITAL WIRELESS HEAD UNIT ONLY BLACKCompatible with Bluetooth SMART sensors Customizable display to show only the functions to read, with programmable middle and row displays Compatible with Bluetooth heartrate and speed cadence SMART sensors Not included Automatic 2nd bike recognition (sensor & tire size) Import a summary of ride data and upload to websites Very large display in three rows ClickTec button interface Programmable odometer