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_73778 ( "Driver Unit Model No." text, "Release Year" real, "Output Voltage (RMS)" text, "Inputs" text, "Outputs" text, "Notes" text )

### Question ###
How many outputs are there for solid state, battery operated for portable use listed in notes?

### Accurate SQL ###

SELECT COUNT("Outputs") FROM table_73778 WHERE "Notes" = 'Solid state, battery operated for portable use'