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_27615520_1 ( form_factor VARCHAR, product_name VARCHAR )

### Question ###
List the range distroration for the ramsan-630

### Accurate SQL ###

SELECT form_factor FROM table_27615520_1 WHERE product_name = "RamSan-630"