Press the "POWER" button once, the sceen will display 10 seconds count down indicating the tester enters into. "warm up" mode.When the "blow" symbol displayed and 10 seconds count down started, indicating the tester is, ready to test.Exhale pneuma into breath inhaler for 3-5 seconds gently, then read the result from the alcohol tester LCD.
Features：
LCD screen display, Easy to read
Auto power off after test
Advanced semiconductor(flat-surfaced) alcohol sensor
No need to change the nozzle for non-mouth contact, not consumable cost.
Specifications：
Package Dimension:11cm*8cm*2.5cm
Range: 0.00-0.19%25 BAC and 0.0-1.9g;
Powered by 2 x AAA alkaline batteries (not included).
Material：Plastic
Package Contents：
1* Alcohol Tester
