Features [4 in 1] This alcohol tester is 4 effects in 1, containing tester, glowing flashing light stick, chamber whistle and 1.3in curved HD color screen. Equipped with intelligent chip, highly sensitive sensor, more accurate measurement. [Contact Free] Our breathing alcohol tester is contact free and blowing alcohol detection, fast ranking without waiting. Can be continuously tested by multiple people, can store 3000 detection information, detection records can be viewed at any time. [Flashing Light Stick] This breathing alcohol tester also adopts glowing flashing stick. With alcohol lights up, you can press the button to open the flashing light. [Chamber Whistle and HD Screen] This breathing alcohol detector is with large sound rear buzzer and curved HD 1.3 inch color HD screen display at a glance. [Wide Use Scenario] Drunk driving breathing alcohol detector can be applied for drink testing, construction inspection, logistics, site, coal mine, etc. Specification: Item Type: Alcohol Tester Material: ABS Battery Model: 18650 Lithium Ion Battery 3.7V 3000mAh (With Built In Battery) Measurement Range: 0-400mg/100ml Use: Widely Used In Checking Drunk Driving, Alcohol Detection, Construction Inspection, Logistics, Construction Sites, Coal Mines, Etc. Package List: 1 x Alcohol Tester 1 x Manual 1 x Charging Cable Package List 1 x Alcohol Tester 1 x Manual 1 x Charging Cable