1、Simple Operation: The setting of this tester is not difficult for you to operate. The breath meter uses the latest design and it's convenient for you to use. Just tear the package and you can use it. 2、Screen: With a digital display screen, the instrument has background light, which helps you to read the result clear and avoids misundestanding in order you can leave safely. 3、Accurate: This tester has the latest design that has improved a lot better. The tester also uses scientific principles, which makes the final data that you measure are extremely accurate. 4、Portable Size: The breath meter is very small to take to any place. The tester saves space for you that you can put in your pocket , keyring, handbag, belt hook. 5、Applicable Scene: This device can be used to measure alcohol levels in the body after drinking with friends and family. If you meet traffic officer on the road, you can also test yourself and avoid using public equipment.Item Type: Breath Tester Material: ABS Battery: 2 x AAA Batteries (not included) Install the battery 1. Slide the battery cover from the back of the battery. 2. Insert 2pcs AAA batteries with correct polarity. 3. Close the battery case cover. How to use 1. Press the power button once, the LCD of the tester will open with a beep sound. 2. The "Preheat" is displayed and the countdown from 10 to 00 starts, which indicatS that the tester is in preheat mode. If the first warm‑up fails, the tester will reset automatically and warm up again 1‑3 times. 3. When the preheating is successful, the "Blow" is displayed, and the 10‑00 countdown starts, indicating that the tester enters the test mode. 4. Approach and blow into the inhaler for 3‑5 seconds. 5. Read the test result from the tester LCD. Turn Off 1. The results show that after about 10 seconds, the "OFF" will appear for 2‑3 seconds and the tester will turn off automatic. 2. If the warm up fails, the tester will shut down automatically. 3. In test mode, if you do not blow into the breathing inhaler within 10 seconds, the tester will turn off approximately 10 seconds after the LCD displays the result of "o.00% BAC & 0.0g/I".1 x Breath Tester 1 x Instructions