1.original Sigma cycle computer 2 the latest 2011 new stytle,have two bike function ,light in night and wireless 3.G.W.:0.11KG original sigma cycle computer function:1,Current speed2,Average speed3,Comparison speed/average speed4,Maximum speed5,Trip distance6,Programable trip section counter7,Total distance bike1+28,Clock9,Stopwatch10,Programable time counter11,Trip riding time12,Total riding ...