Feature Highlights: 1. Audible Alert System – Get clear, instant feedback with a built-in audible alarm when alcohol is detected. 2. Easy-to-Read LCD Backlit Display – View results clearly, even in low-light conditions. 3. Fast Response & Recovery – Delivers accurate readings in seconds and is ready for the next test quickly. 4. Wide Detection Range – Measures BAC from 0.00% to 0.19% (0.0–1.9g/L), suitable for personal use. 5. Auto Power-Off – Saves battery life by automatically shutting down when not in use. 6. Portable Keychain Design – Compact, lightweight, and easy to carry wherever you go. 7. Battery-Powered – Runs on 2 AAA batteries (not included) for convenient everyday use. Product Details: This professional digital breathalyzer offers a reliable and user-friendly way to check your alcohol level. It features an advanced semiconductor oxide sensor for accurate detection, a simple one-button operation, and a quick warm-up time of under 10 seconds. Ideal for personal safety checks before driving or after social events, it helps you make informed decisions with confidence. Specifications: - Color: Black - Sensor: Advanced semiconductor oxide alcohol sensor - Detection Range: 0.00%–0.19% BAC (0.0–1.9g/L) - Accuracy: ±0.01% BAC (0.1g/L) - Warm-Up Time: Within 10 seconds - Response Time: Within 5 seconds - Operating Temperature: 10°C–40°C - Humidity Range: 40%–90% - Power Supply: 2 AAA batteries (not included) - Item Size: Approx. 11.8 × 7 × 2.8 cm / 4.6 × 2.7 × 1.1 in - Item Weight: Approx. 52 grams Package Includes: 1 × Breath Alcohol Tester 4 × Mouthpieces 1 × English Manual