Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_69 (kb_s VARCHAR, avg_transfer_rate_ INTEGER, device VARCHAR)
### Question:
What is the smallest transfer rate for a 3243 device?
### Answer:
SELECT MIN(avg_transfer_rate_)[kb_s] FROM table_name_69 WHERE device = 3243