Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_2394927_1 (bandwidth___mhz__ VARCHAR, profile VARCHAR)

### Question ###
What are the mhz when the profile is 8b?

### Accurate SQL ###

SELECT bandwidth___mhz__ FROM table_2394927_1 WHERE profile = "8b"