Feature: 1. POCKET SIZED AND PORTABLE: Experience the convenience in carrying this pocket sized alcohol tester, which allows it to fit effortlessly in your wallet or pocket. Perfect for weddings, parties, banquets, or any social events to ensure you drive safe after consuming alcohol. 2. SEMICONDUCTOR SENSOR TECH: Our alcohol tester employs a highly sensitive semiconductor sensor designed to precisely display your body's alcohol content. An invaluable tool in helping you understand your limit and ensure your safety post drinking. 3. USER FRIENDLY OPERATION: Operating this alcohol tester is a breeze! Simply breathe into the device for three seconds and your test results will display on a bright, easy to read screen. Knowing your alcohol level has never been this straightforward and quick! 4. ROBUST DESIGN: Composed of sturdy ABS material and electronic components, rest assured that our alcohol tester will stand the test of time. Expect long lasting performance accompanied by accurate readings on every use. 5. SMART ENERGY: This tester is designed to function with three AAA batteries. Despite needing to purchase batteries separately, this smart design allows for easy access to replacements and ensures the longevity of your device. The advantage is yours with this clever and functional alcohol tester. Specification: Item Type: Alcohol Tester Material: ABS+Electronic Components Battery: 3 x AAA Battery (not included) Measurement Range: 0-0.20% BAC Operating Temperature Range: -5°C to 45°C Storage Temperature Range: -20°C to 50°C Model: MR997. Package List: 1 x Alcohol Tester 4 x Blow Mouthpieces 1 x User Manual