PORTABLE BREATH ALCOHOL TESTER The ALERT™ J4X portable evidential breath alcohol tester is trusted by law enforcement professionals worldwide. At its heart is our highest quality Electrochemical Sensor (Fuel Cell).

It uses one button to control power, testing, history recall and calibration.

- See more at: http://acs-corp.com/products/law-enforcement/alert-j4x/#sthash.dRMOEUsu.dpuf