1. Insert a mouthpiece into the mouthpiece inlet.

2. Slide up the ON/OFF power switch that is located in the right side of the unit.

- The detector will show "on" together with a sound and then start to count up from 000 to 100% on the display. This warm-up process prepares the sensor and circuit for testing.

3. When you hear beep sound & "Ready " display is on, please blow steadily into the mouthpiece until you would hear the "Beep " sound again. Stop blowing.

- In this stage, if you don´t blow within 30 seconds, it automatically turns off.

- In case you drink very little (if actual concentration would be below 0.01% BAC/0.05mg/l BRAC), it may not be activated. However, it shows still 0.00% and you’re said to be in safe range.

4. After the circling line is on the display for 5 seconds, the test result (BAC or BRAC) will be displayed by 3 digits for 20 seconds along with beep sound.

- If the BAC/BRAC data would be over 0.05%/0.25mg/l (default setting) respectively, the LCD color will be changed from blue to red and "WARN " signal will be displayed along with "Alarm " sound.

5. Finally, the unit will turn off automatically along with a sound.

6. For the successive testing, try again from No.2 to No.4.

7. Space tests at least 2 minutes apart.