Description:    LED Large Screen: The new modern design with LED display indicator clearly shows the blood alcohol level. Precision 4.0 algorithm, accurate reading.           Specification:    Model: C9    Sensor type: Semiconductor type sensor    Display: LCD liquid crystal display (black and white)    Shell material: ABS    Test range: 0.00-0.19%BAC(0-1.9g/l)    Measurement unit: mg/l (BrAC) mg/ml (BAC)    Measurement mode: quick check, automatic detection    Measurement time: 20 seconds    Power supply mode: built-in rechargeable polymer lithium battery    Using battery: 3.7V 140MAH can be tested 150 times continuously    Power adapter requirements: DC5V 1A    Working temperature: 0-45℃    Warm-up time: 10 seconds    Blowing time: within 10 seconds, more than 4 seconds required    Response time: less than 5 seconds    Working current: 250MA (max)    Standby current: less than 20UA        Packing list:    Alcohol Breath Tester*1    Charging cable*1    Instruction*1