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