1、This is a professional alcohol tester for personal,police and home use with blue backlit digital LCD Screen
2、Advanced Flat Surfaced Alcohol surfaced alcohol sensor which has excellent sensitivity and reproducibility;Rapid Detect Results,Quick Response and Resume
3、Audio Warning Beyond Pre-set Limit:When the alcohol content exceeds the permitted level, this device sends a warning to remind your safety.
4、With the part to insert mouthpiece and the mouthpiece can be replaceable,health and convenient
5、Compact,pocket sized unit that can be carried anywhere discreetly;can be used as a Christmas' Gift or New Year's Gift for friends.

Features: 
Direct Testing Process LCD indication 
Smart MCU controls 
SMD assembling, stable performance 
Sensor Fault Self Checking 
Battery Saved Design,Low Voltage Indication 

Specification: 
Detection Range: 0.00-0.20 BAC%; 0.00-2.00g/L;0.00-2.00BAC‰;0.00-1.00mg/L;0.00-200mg/100mL 
Alarming Level: 0.05BAC%; 0.50g/L; 0.50BAC‰;0.25mg/L; 50mg/100mL 
High Accuracy: ±10% F.S 
Working Voltage: DC4.5V(3xAAA) Batteries（Batterise are not included） 

Attention Please !! 
In order to get more reliable record as possible,there are some tips which need to pay more attention. 
1.It is recommended to wait 20 minutes after drinking before testing, because alcohol takes about 20 minutes into the blood from the digestive organs,and residual alcohol in the mouth takes time to dissipate. 
2.The distance should be at least 3 minutes between each test to get a more accurate result. 
3.Do not use benzene, gasoline and thinners cleaning product ingredients tester. 
4.Do not allow any liquid penetrated into the sensor. 
5.Please carefully read user manual to guide your better use.