Features: Professional Alcohol Tester with Advanced Semiconductor sensors for fast Results, intelligent alarm, and Three Measurement Units. Features energy saving auto shutdown, replaceable mouthpieces, and compact ABS design for stable breath analysis any where. Essential for drives, parents, and employers to verify safe alcohol levels before operating vehicles or workplace machinery. Portable breathalyzers fits in car compartments, bags, or pockets for quick checks at home, roadside, or event . Includes 5 hygienic mouthpieces and a carrying pouches for convenient alcohol testing during travel, parties, or daily commutes. Specifications: Name: Respiratory Alcohol Tester Model: AT-818 Size: about 165x118x45mm/6.5x5x2inch Power supply way : 3xAAA battery(Not included) electric : 4.5v Measurement ranges: 0.00-0.20BAC% Measurement accuracy: ±0.0120BAC% Package Includes: 1xAlcohol Tester note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.