Intelligent single-chip microcomputer control, advanced plane alcohol sensor. Quick response and recovery, the alcohol tester responds in 5 seconds and recovers as before after 20 seconds Direct test process with LCD indication, BAC 0.000%, 0.00%0, mg/l Digital LCD display with light blue backup, the test result is obvious Portable and stylish design, the size of the alcohol tester is 112 x 61 x 29mm, compact, and easy to carry Audio warning that the preset limit is exceeded With sensor fault self-check function. Power saving design, low voltage indication Specifications: Sensor type: flat alcohol sensor Working voltage: DC4.5V 3 x AAA batteries (not included) Working current: 120mA Working environment: Temperature: -10C to 50C Relative humidity: 95% without condensation Detection range: 0.001.00mg/L 0.0000.199%BAC; 0.001.90g/L; 0.001.99BAC Alarm level: 0.25mg/L (0.05%BAC, 0.50g/L; 0.50BAC) Accuracy: 10% F.S Response time: 5s Recovery time: 20s Display: 3-digit LCD, light blue backlight Expected battery time: 200 times Package included: 1 x Alcohol Tester 5 x Mouthpiece 1 x Cloth Bag 1 x English and Chinese Manual