This is the FULL SET from 2009 with belt sensor for best accuracy, and wrist readout for convenience.

Lots of features incl heart rate; speed & distance; calories; stopwatch - see the list on the box.

Used only a few times, the components are in like-new condition.  The box has shelf-wear and scuffing (see pix).

With full original instructions. Takes two CR2032 batteries (included).