Alcoscan AL7000 is a hand held, portable breath alcohol tester to check subject's breath alcohol concentration withreliable accuracy. 

Specification 
Indication of B.A.C.: 0.00 to 4.00 ‰ or 0.000 to 0.400%BAC or 0.00 to 2.00 mg/l BrAC by LED display 
Sensor: Replacable semiconductor type alcohol sensor
Accuracy: ±0.01%BAC at 0.05%BAC 
Mouthpiece: use  
Power: Two 1.5V "AA" size alkaline batteries and 12V cigar jack in car/ Auto Power off                
Weights: 103g (Including Batteries)  
Dimension(mm): 116 (height) X 50 (width) X 21 (thickness)  
Audible warnings: 3 steps beep warning of alcohol detection with LED display 
Available color: Silver  

Mouthpiece Holder 
It can keep 2pcs mouthpieces inside of breathalyzer. 

What is Pre-Calibrated Replaceable sensor module? 
One of the main problems with using breathalyzers in critical applications is that the alcohol sensor, no matter what type, requires periodic re-calibration. Unfortunately, the recalibration process requires that the breathalyzer be physically mailed or taken to a  professional service center, at which point the device must be evaluated and proper steps must be taken for calibration with an expensive simulator system. 
The process is costly for both consumer and service center, and the delay of processing and shipping back-and-forth can be quite a loss. The Pre-Calibrated Replaceable Alcohol Sensor Module can eliminate the delays and complications of re-calibration by allowing you to simply "snap out" an old module and "snap in" a new module. 
This way, you can get back to reliable, accurate testing in a matter of seconds!