This breathalyzer uses advanced sensor technology, it can give you an accurate and reliable result in seconds. Quick response and resume, easy to operate. Small size, lightweight and easy to carry. 1 x winding stem extender bag (about 100 pieces) 1. It adopts advanced sensor technology, can give accurate and reliable result in seconds. 2. Quick response and resume, good accuracy, easy operation. 3. Small size and light weight, easy to put in purse or pocket. 4. One button works, easy to use, just press the switch. 5. Automatic power off, energy saving. Digital breathalyzer with audible alarm, more intuitive and convenient. 6. Backlit LCD display for easy reading. Please allow slight dimension error due to manual measurement. Item Type: Alcohol Tester Material: plastic Colour white Sensor: advanced semiconductor alcohol sensor Range: 0,00% -1,9% BAC (0,0-0,19 g/L) or 0,00-0,95 mg/L BRAC Accuracy: 0,01%BAC Heating Time: 10s Response time: <5s Display: LCD display Product Size: 9.5*3.5*1.3cm/3.7*1.4*0.5 inch Package weight: approx. 36g List of packages: 1 * Alcohol Tester 1 * hanging rope 1 * instruction in English In camera mode, briefly press the power button once, the blue light flashes three times, then turns on, and the device vibrates once, stops the camera and automatically saves the file in AVI format and goes into the ready stateci.B. 1. The warm-up state will jump from 10 to 0, and then the Blow state from 10 will jump to 0 to complete the warm-up procedure. 2. Start the countdown to 6 seconds and apply your mouth to the breath test sensor and exhale to the sensor for 3-5 seconds.