User's Manual

4. The preheating time is 90 seconds, will keep flashing. When the preheating

complete, there is a long beep sound. The following is the preheating cycle diagram.

5. After the preheating is completed, is always on. If the user presses the switch

button to start the breath test, will extinguish.

Note: If the user does not press the switch button, it will automatically shut down after

30 seconds

6. There will be an icon display during the breath test, and the blowing time will

count down from 20 seconds. The user can start to blow, being careful not to wrap the

vent. During the countdown of the last 5 seconds, the device will emit a beep sound

every second. When the test is completed, the device will emit 2 beeps.

7. After the blowing is completed, the device starts to calculate the result, and the result

will be displayed on the display in real time. If you need to test again, press the button

to restart.

Note: If the user does not press the switch button, it will automatically shut down after

30 seconds