High Accuracy Test: The electronic breathalyzer uses high sensitivity semiconductor technology. There are three test results: Safety: less than 0.200% BAC, green; Caution: 0.200%-0.800% BAC, yellow; Hazard: greater than 0.800% BAC, red. Portable Design: Small portable breathalyzer can be placed in cars, bags, backpacks or briefcases. The alcohol self test provides a safe driving guarantee, which is the best gift for family and friends. No contact detection: The alcohol analyzer does not adopt of contact design, No need to contact your lips, blow out the air inlet, it can prevent bacteria from breeding and healthier. Easy to use: Open the tester of alcohol, run for 10 seconds to preheat, blow the air for 5-10 seconds. Then the Blue Backlight LCD screen will quickly and accurately show your BAC content, you can decide to drive after the test. USB Rechargeable: Built-in polymer lithium battery (150mAh), can be charge via mobile phone charger or computer USB port. You can use 300 times after fully charged Specification: Measure sensor: semiconductor sensor Material: Abs Board Voltage: DC 5V 1A Battery Capacity: 150mAh Measurement range: 0-0.95mg/i Charging time: 10s < p>Reaction time: 5s Power supply method: lithium battery construction polymer Unit of measurement : Mg/I (BRAC), M/I (BAC), %BAC, MG/100ML Display: LED display Use: Read the manual carefully before using the tester. Warm the tester several times before performing the test. Do not perform this test before 20 minutes after drinking alcohol. It is recommended to repeat the test 2-3 times. Wait at least three minutes before the test is re-performed. Test results are for reference only.