Greattop cheap breathalyzer alcohol tester With clock GT-ALT-37 

Main Features:
Advanced semiconductor alcohol sensor
Quick response, excellent accuracy
Smart MCU control
Direct testing process LCD indication
LCD indication, backup lamp
Portable design
No touch health design
Audio warning beyond pre-set limit
Power saving design, low battery indication
Design patented

Technical Information:
alcohol tester Sensor type: NM planar Semiconductor alcohol sensor
alcohol tester Detection range: 0.00-0.0.20%BAC; 0.00-2.00%oBAC; 0.00-1.00mg/L
alcohol tester Alarming level: 0.24mg/L (0.05%BAC, 0.50g/L, 0.50%oBAC)
alcohol tester Accuracy: 5% F.S
alcohol tester Warm-up Time: 10s  Response Time: 5s  Resume Time: 30s
alcohol tester Working Voltage: DC3V (2*AAA) alkaline Batteries for Alcohol tester
alcohol tester Working Environment:  Temperature -10°C~50°C  Relative Humidity 95%
alcohol tester Display: 4 digital LCD display with light yellow background.
alcohol tester Battery expectancy time: more than 200 times