R&D INSTRUMENTS RD900 High-Sensitivity Rapid Screening Alcohol Tester Portable Breath Alcohol Detector 1. Automatic alarm with three-color detection indicator. Display screen combined with lights and buzzer alerts for clear, easy-to-understand drunk driving detection 2. Triple-alarm system for test results: audible alert, tri-color light warning, and display notification. Instantly identifies and eliminates drunk driving risks 3. High-definition color LCD screen for clear, at-a-glance measurement data 4. High-capacity lithium battery ensures long-lasting performance. Type-C charging provides extended battery life 5. High-precision smart chip and ultra-sensitive sensor deliver accurate, responsive readings. Supports consecutive multi-user testing for enhanced precision 6. Scientifically designed air pathway filters impurities and alcohol for enhanced measurement accuracy 7. Historical test records support consecutive multi-user testing. Stores up to 9 test sets with power-off memory. Press MEM to review records; long press to clear Specifications 1. Warm-up time: 10 seconds 2. Sensing time: 5 seconds 3. Measurement accuracy: ±10% 4. Alarm method: LED indicator and buzzer 5. Display: 2.5-inch color LCD screen 6. Battery: built-in 3.7V, 320mAh lithium battery 7. Charging port: Type-C 8. Charging voltage: DC 5V 9. Charging current: less than 1A 10. Size: about 13 x 6.58 x 2.26cm 11. Weight: about 120g