Feature: 1. Digital alcohol tester with audible alert. 2. LCD backlight display for easy reading. 3. Quick response and resume. 4. 0.00%-0.19% BAC (0.0-1.9g/l) detect range. 5. Auto power off. 6. Small size with key chain, light weight, easy to carry. 7. Powered by 2pcs AAA batteries(Not included). Specification: Features: Digital alcohol tester with audible alert. LCD backlight display for easy reading. Quick response and resume. 0.00%-0.19% BAC (0.0-1.9g/l) detect range. Auto power off. Small size with key chain, light weight, easy to carry. Powered by 2pcs AAA batteries(Not included). Specifications: Color: Black Sensor: Advanced semiconductor oxide alcohol sensor Detect 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: 5~40℃ Power Supply: 2 * AAA battery (NOT included) Item Size: Approx. 112 * 68 * 28mm / 4.41 * 2.68 * 1.10in Item Weight: Approx. 45g / 1.59oz Package Weight: Approx. 79g / 2.79oz Package Size: Approx. 12.4 * 8 * 3.5cm / 4.88 * 3.15 * 1.38in Packing List: 1 * Breath Alcohol Tester 4 * Mouthpieces Package List: 1 * Breath Alcohol Tester 4 * Mouthpieces