1.original Sigma cycle computer 2 the latest 2011 new stytle,have two bike function , ... and wireless 3.G.W.:0.11KG original sigma cycle computer function:1,Current speed2,Average speed3,Comparison speed/average speed4,Maximum ... ,Stopwatch10,Programable time counter11,Trip riding time12,Total riding time 1+213,Memory fuction14,2 wheel sizes programalbe15,Current temperature16,Backlight ...