We are offering Features -No need to warm-up, rapid test, result within 1 second -No need for mouthpieces, clean and hygiene -Fuel cell sensor -Dot-Matrix colorful LCD -Matrix red and green light corresponds to different results -Flashlight helps in midnight -Dolphin shape design Technical parameters Testing range: 0-2mgl, 0-0.4% BAC, 0-4%0BAC,0-4gl Alarming: can be customized Working temperature and humidity: 0-500C, less than 95%RH No Dews Battery: 4*AAA Dimension: 284mm*69mm*74mm Weight: 400g Certificate: CE, RoHS