Professional breathalyzer with red LCD display and digital backlight

Features 1. Shockproof injection molding shell, reliable and durable. 2. Energy saving, 2pcs AAA alkaline batteries last for 1 year standby. 3. Digital red LCD display to show clear results both in days and nights. 4. Quick response and resume, build in semiconductor alcohol sensing chip. 5. Environment and healthful. Blowing design with six mouthpieces for multiple users. Specification Features: Shockproof injection molding shell, reliable and durable. Energy saving, 2pcs AAA alkaline batteries last for 1 year standby. Digital red LCD display to show clear results both in days and nights. Alcohol content ≤0.49 with green LED Backlight, alcohol content ≥0.5 with red LED Backlight. Quick response and resume, build in semiconductor alcohol sensing chip. Environment and healthful. Blowing design with six mouthpieces for multiple users. Specifications: Test Accuracy: ±0.01%BAC Operating Time: warm up: 20s, response: 30s, reaction: 3s Power: 2 * AA alkaline battery (Not Included) Material: ABS Impact Resistant Material Sensor: Sensitive Semiconductor Size: 12.0*4.4*2.1cm/4.7*1.7*0.8in Package Weight:113g/4.0oz Pacakge List: 1 * Digital Breath Alcohol Tester ( Battery Not Included) 6 * Mouthpieces 1 * User Manual How to Use Operation Method: 1. Press and hold the power switch for about 2 seconds, the buzzer beeps, the instrument performs internal self‑test and preheating, the display starts counting down from 150, which lasts for 15 seconds, if the sensor preheating is completed, the number counts down to 000, and enters BLOW state. 2. At the end of the countdown, a voice prompt will be issued, and the green light will turn on at the same time, and the screen will display the letter "BLO", indicating that the instrument is normal, and the air blowing detection can be started. 3. Blow at the air inlet for about 5 seconds. If alcohol is detected, the buzzer will beep for a long sound, and the number of the digital tube will appear 003, 002, 001. After the countdown, the concentration data will be displayed. If the concentration is between 0.00 and 0.05 , only the green light flashes, and the buzzer emits short syllables of B, B, B; if it is greater than or equal to 0.05, only the red light flashes, accompanied by a rapid sound alarm beep beep beep. The instrument display turns OFF after the concentration data is held for 15 seconds. If no alcohol gas is detected, after the BLO flashes for 10 seconds, the displayed result will be 0.00. 4. If no alcohol is detected from the blowing air or no detection is done within 30 seconds after the power is turned on, the instrument display will change from 000 to 0FF. 5. When the instrument encounters high concentration of alcohol gas, it is recommended that the instrument be placed for 5‑10 minutes for testing, because alcohol&nbs