Portable Blow Type TFT Screen Alcohol Tester 1. Material: ABS 2. Voltage: 3V 3. Drunk driving alarm reminder 4. The difference between the three-color indicator lights 5. High sensitivity, strong anti-interference 6. With keychain, easy to carry 7. TFT high-definition screen display is softer 8. Measurement accuracy: +- 0.01% BAC 9. Measuring range: 0.00-0.19BAC 10. Preheating time: 10S, response time: 5S 11. Avoid blowing the tube to breed bacteria, blowing without contact 12. Built-in 400mAh lithium battery, USB charging interface 13. High induction chip, smart sensor, more accurate measurement 14. Built-in purification chamber to filter other impurities, leaving only alcohol 15. Dimensions: 60x31x19mm 16. Net weight: 24g Packing list: -Alcohol tester x 1 -Instruction manual x 1 -Data cable x 1