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_name_49 (voltage VARCHAR, model_number VARCHAR)

### Question ###
What's the voltage for the pentium dual-core e2140?

### Accurate SQL ###

SELECT voltage FROM table_name_49 WHERE model_number = "pentium dual-core e2140"