iv bought this out of a import subaru would i need a band expander as it oes have a uk aerial connector

 

one is a main aerial
one is a sub aerial
the sub aerial should be smaller.
sorry dont know what they do but a lot of after market JDM stereos have them.
if it is from japan you will need a band expander to pick up most uk stations.

 

Can't see the front mate but most now have tv's in them. One radio aerial and one for your tv.