>>364021147
To clarify:
There are v1 and v2 base stations. 
There are also classes of trackers; 1.0 with the grey button, 2.0 with the blue and 3.0 that are smaller and black. There are also tundra trackers that are the same as 2.0 and 3.0 in terms of comptability. 

1.0 trackers are only compatible with 1.0 base stations. 
2.0 , 3.0 and tundra can be used with either 1.0 or 2.0 base stations.

Hope this helps!