For DWI, there are two alcohol breath tests.
Only perform the roadside breath test if you are sure you will blow less than 0.08. Otherwise, refuse this test.
Before performing the police station breath test, ask for and call a witness to delay the test.
If you are sure you will blow less than 0.08, take this police station breath test. If you refuse the police station breath test, the DMV will suspend your license for 12 months.
If you expect to blow over the limit, you may refuse the jail breath test to avoid a high result & accept the 12-month suspension.
Either choice may have consequences.