Features: The easy carry Breathalyzer delivers fast , reliable blood ethanol content readings via a high accuracy semiconductor sensor, featuring LED display and voice alerts for clear notifications. This small ethanol detector boasts a lightweight design with LCD screen, rapid 3 second analysis, and includes 5 disposable mouthpieces for hygienic multiple user testing. Ideal for drivers, frequent travelers, and safety awake professional requiring quick personal or workplace ethanol level verification. Use this car ethanol tester discreetly at parties, during roadside checks, or for routine home safety monitoring to prevent impaired driving risks. Engineered with strong plastic metal construction, its alarm system and pocket friendly size make it a multifunction tool for personal, automotive, and occupational safety applications. Specifications: Material: Plastic + Metal Size: 120x55.5x17mm/4.72x2.16x0.67inch Package Includes: Host MR503B×1 USB charging cable × 1 Chinese and English User Manual × 1 Mouth blowing × 5 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.