These are available in two different models. Breath Alcohol Analyser are portable instruments which are simple to use, yet provide accurate measures of breath alcohol concentration for safety needs. ELAN Model uses advance semiconductor and MARK V uses electrochemical fuel cell sensor technology to ensure reliable and accurate information as well as convenient mode of operation. Various private corporate use these models to check their drivers and their employees. ELAN is very handy in use and there is no need of mouthpiece and can be kept pocket MARK V comes with a small metal case for storage of the MARK V and its mouthpieces for easy transportation and to prevention.