Product RelatedThank you for your bidding first! You are welcome to our new store， all our items are at very low price the item with high qualityFeatures:100% brand new and high qualityThe is a premium grade digital alcohol breath detector. Use of innovative technology Electronic Valve Flow Detection Technology and Dynamic Environmental Compensation Technology provides extremely precise and reproducible results of meassurements.Electronic Valve Technology automates the sensor to start collecting test sample only when a certain air pressure point produced by the blowing action is reached. This enhanced feature .borrows the same idea from fuel cell breathalyzers， for the purpose to capture the test sample from deep lung for accurate measuring.Dynamic Environmental Compensation Technology enhances the stability and accuracy of our breathalyzers under dynamic environment conditions (eg: variance in temperature and humidity) to avoid false positive reading.Product Specifications:New generation semi - conductor sensorDECTTM technology: Dynamic environmental compensation technologyEVTTM technology: Electronic valve flow detection technology4 Digital LCD display ， DOT-Matrix on screen menuDetection range: 0.000-4.000?accuracy: 0.001%Measurement Unit : ?(Promile)or ?BAC or mg/l or g/lDimensions : About 114 x 51 x 18 mm / 4.53 x 2.05 x 0.71 inchWarm up: Between 15-50 secondsTester use 2 x 1.5V AA alkaline batteries ( Not included )Response time: Less than 5 secondsPackage Includes:1 x Digital Alcohol Breath Tester3 x Mouthpieces1 x Pouch1 x User Manual