High-precision detection: With excellent sensing technology, it can accurately measure the alcohol content in human exhaled gas, providing a reliable basis for drunk driving judgment, with extremely small errors, making the test results . Non-contact blowing: Using advanced blowing detection method, there is no need for direct contact with the tester, which is both hygienic and convenient, effectively avoiding the risk of -infection, while improving the detection efficiency, and the use of scenarios is more extensive. Three-color indicator warning: equipped with three distinct detection indicator lights of red, yellow and green, which can clearly display the drinking status. The red light is drunk driving, the yellow light indicates drunk driving, and the green light indicates no drinking, allowing users and law enforcement officers to quickly and intuitively judge the results without complicated interpretation. Voice broadcast: The considerate voice broadcast design automatically and clearly broadcasts the alcohol content and the corresponding drinking status information after the test is completed. Whether in a noisy environment or for people with poor eyesight, you can easily know the test results, which is convenient and practical. USB charging: Built-in high-performance lithium battery, support USB charging method, the trouble of frequent replacement of traditional batteries. It can be anytime and anywhere to that the alcohol tester is always on standby and has no worries about battery life. It is extremely convenient for long-term law enforcement work or daily personal use. Specifications: Battery: built-in lithium battery (200mAH) Charging input: 5V1A Operating voltage: 3.7V Sensor type: semiconductor gas sensor Alcohol concentration measurement range: 0~200mg/100ML Indicator light: red light (drunk driving), yellow light (drunk driving), green light (no drinking) Due to different batches, there may be differences in product appearance and printed text, which not affect use Colour: Black Material: ABS Package Contents: 1 x alcohol tester 1 x charging cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.