Large Screen Portable Respiratory Alcohol Tester Auto Digital Breath Alcohol Tester Breathalyzer Analyzer Detector Practical Characteristic: 100% brand new quality Intelligent control Advanced flat alcohol sensor Quick response and recovery SMD assembly stable performance Direct test LCD showed that BAC was 0% 0% 0 mg/L. Easy Shuttle Light blue digital liquid crystal display Portable Garment Design Audio Warning Over Preset Limits Sensor fault self-detection Battery saving design low voltage indication 3XAA alkaline batteries (excluding batteries) Note: for the convenience of transport to ensure product delivery is in good condition we do not use packing box but using telescopic bag packaging telescopic bag such as product details page as shown in the last picture (products are quality goods other accessories are the same if you mind no box please carefully consider to be clear about whether to buy we consider the interests of the buyer if you have any questions please contact customer service wish you a happy shopping) Description: This is a professional alcohol tester for personal police and home LCD. High quality and high sense it can respond to 5 seconds. It can be replaced by inserting part of the larynx and larynx which is hygienic and convenient.