Features: High precision: This alcohol tester adopts a high-precision semiconductor alcohol sensor, just only 5 seconds can give a result to judge whether you can drive or not.  Easy to use: Just press the power button to start the professional breathalyzer, wait for 10 seconds for warming-up, then blow to the breathalyzer for 5 seconds, the result will be shown after 5 seconds. It displays results of alcohol concentration with hints of ringing.  Touchless and healthier: No need to change the nozzle for non-mouth contact, not consumable cost. Upgradable blowing design technology, under the premise of the accuracy of test data and it is much healthier.  Portable design: This professional alcohol breathalyzer just needs small space, can be easily carried in your pocket everywhere. Great for weddings, parties, feast,s or other social activities, ensures your safe driving after drinking.  Alarm data can be set by yourself. Red light backlight, the digital display is more clear.  It is powered by 2*AAA(Not including). Automatic shutdown function, more power saving.   Specifications: Item name: Breathalyzer;  Material: ABS;  Color: White;  Warm-up time: 10s;  Response time: within 5s;  Working environment: 5～40 degrees Celsius;  Test range: 0.00%- 0.19% BAC;  Battery: 2*AAA(Not including);  Product weight: 25g;  Product size: 10.2*3.8*1.8cm;  Package information: Package weight: 40g;  Package size: 15*7.7*2.2cm;   Package list:  1*Breathalyzer;  1*Hanging rope;  1*Manual