Description: Breath Alcohol Tester with LCD Display: Large LCD digital display of measurement results, clear and visual, touchless design is safe for daily use. Sound and Color Warning :Three color indicator lights, Green (Driveable)/Yellow (Drunk Driving)/ Red (Heavy Drunk Driving). Sound alarm warning function started when the light is display in Yellow and Red, help to avoid Drunk Driving. C Language Calculation Method: Built-in purification chamber, filter other impurities, leaving only alcohol, make the test results more accurate and reliable. High Accuracy Alcohol Detector: Built-in sensitive chip, clear and easy to read, breath for 5-10 seconds, read within 5 seconds.Detect range is 0.00~0.19% BAC & 0.0~1.9g/l. Portable Rechargeable Breath Tester: Handheld alcohol tester is USB rechargeable, 3.V/ 300MAH built in battery, can realize about 300 times of continuously measure, suitable for indoor / outdoor use. Specification: Material: ABS Plastic Size: Approx. 95x25x15mm/ 3.74x0.98x0.59inch Test Range: 0.000-0.199%BAC(0-1.9g/ L) Measurement Unit: Mg/L (BrAC) mg/ mL (BAC) Measurement Mode: Quick Investigation/Automatic Detection Power Supply: Built-in Rechargeable Lithium Battery Measurement Time: 10 Seconds Preheating Time: 10 Seconds Blowing Time: within 10 seconds, more than 4 seconds Reaction Time: less than 5 seconds Operating Current: 250MA (Max) Standby Current: less than 20UA Power Adapter: DC5V /1A Operating Temperature: 0-45°C Package Includes: 1 Piece Breath Digital Alcohol Tester 1 Piece USB Charging Cable Note: 1. Please allow slightly error due to manual measurement. 2. How to Use: Press and hold the power button for 2 seconds to start the alcohol tester, Wait for 10 seconds to warm up, and then blow with the tester for 5-10 seconds, the result will be displayed within 5 seconds.