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 (latency__microseconds_ VARCHAR, product_name VARCHAR)

### Question ###
What is the ramsan-810 transfer delay?

### Accurate SQL ###

SELECT COUNT(latency__microseconds_) FROM table_27615520_1 WHERE product_name = "RamSan-810"