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 speed

2,Average speed

3,Comparison speed/average speed

4,Maximum speed

5,Trip distance

6,Programable trip section counter
7,Total distance bike1+2

8,Clock

9,Stopwatch

10,Programable time counter
11,Trip riding time

12,Total riding time 1+2

13,Memory fuction

14,2 wheel sizes programalbe

15,Current temperature16,Backlight