When does the breathalyzer print its little print-out?

Question

Does a breathalyzer print the results for the test immediately? Or, do you get them later at a later date?

Answer 1

Most instruments print the receipt out right away and allows the operator to print multiple copies.

Answer 2

It usually takes 30 seconds and It will display the alcohol level on a lcd on the device.

I've never taken a beathalyzer test, so I don't know how they work exactly.