1、Adopts advanced sensor technology, can give you a accurate and reliable result in few seconds 2、Quick response and resume, good accuracy, easy to operate 3、Small size and lightweight, easy to put in purse or pocket 4、One button operate, easy to use, just need you press the switch 5、Auto power off design, energy-saving. Digital alcohol tester with audible alert, more intuitive and convenient This alcohol tester adopts advanced sensor technology, can give you a accurate and reliable result in few seconds. Quick response and resume, easy to operate. Small size, lightweight and easy to carry. Features: 1. Adopts advanced sensor technology, can give you a accurate and reliable result in few seconds. 2. Quick response and resume, good accuracy, easy to operate. 3. Small size and lightweight, easy to put in purse or pocket. 4. One button operate, easy to use, just need you press the switch. 5. Auto power off design, energy-saving. Digital alcohol tester with audible alert, more intuitive and convenient. 6. LCD backlight display for easy reading. Specification: Item Type: Alcohol Tester Material: Plastic Color: White Battery Type: 2 x AAA( Not Included ) Sensor: Advanced Semiconductor Oxide Alcohol Sensor Range: 0.00% -1.9% BAC (0.0-0.19g/L) or 0.00-0.95mg/L BRAC Accuracy: ±0.01%BAC Warm-up Time: 10s Response Time: 5s Display: LCD Display Item Size: 9.5 * 3.5 * 1.3cm / 3.7 * 1.4 * 0.5inch Package Weight: Approx. 36g Package List: 1 * Alcohol Tester 1 * Hanging Rope 1 * English Manual Note: 1. The status Warm Up number will jump from 10 to 0, and then the state Blow from 10 jumps to 0 to complete the warm-up procedure. 2. Start the counown to 6 seconds and stick the mouth close to breath test sensor, and exhale into the sensor for 3-5 seconds.