Product Features:
1.Adopting new gas detection technology,which can detecting the more actual alcohol content of gas.
2.LCD digital display and colour backlight screen can make detection more ocular &more efficient. 
3.With unique detector ,which can effectively identify cigarettes, coke,coffe smells and prevent non alcohol gas to interfere the detecting result. 
4.With voice alarm function,when alcohol content is excess,the buzzer will alarm automatically alert.
5.It powered by iPod Touch 5/iPhone 5/iPad 4/iPad Mini/iPod Nano 7, just connect it to iPod Touch 5/iPhone 5/iPad 4/iPad Mini/iPod Nano 7 for use. 
6.No need to use blowpipe, just blow into air hole, this way is healthy and clean. 
How To Use?
1. please connect this product to Iphone , then unlock Iphone,then press switch of tester for 2-3 seconds,at the same time LCD screen will appear mactching indicator.
2.state "warm up"Number jumping from 10 to 0, then state "blow" jump from 10 to 0 , which means complete preheat program
3. When the display shows countdown 6 seconds, please blow to air hole and exhale into sensor for 3 to 5 seconds , after finishing Countdown ,display screen will show the test result.
5.If test report can reach to the scope below ,“Caution” will show .
√0.02% BAC(or 0.2g/l)to 0.05% BAC(or 0.5g/l)
0.05% BAC(or 0.5g/l)to 0.08% BAC(or 0.8g/l)
6.If test report can reach to the scope below,“Danger"will show
√over & EQUAL 0.05% BAC (or 0.5g/l)
over & EQUAL 0.08% BAC (or 0.8g/l)
Attention:
1.There often have some gas or sundries adhere to the tester sensor surface,when the tester from out of the packaging for the first time or long time no use,Need time to clean and preheating sensor.If possible, users should press several times power switch key as soon as possible
2.Be suggested to measurement after 20 minutes later of smoking, drinking and eating.
3.It would be best to let the test time pitch last test more than 3 minutes in order to make the test results more accurately
4.Avoiding to use in a strong wind or at the most polluted environment
5.pls don't blow Cigarette Smoke , food or liquid into instrument, otherwise sensor detector will be damaged.
6.pls don't squeeze forcefully or smash this product 
7.Do not drunk driving for the safety of yourself and others please.