Fashion high accuracy Ethanol Tester, breathalyzer, alcometer Alcotest remind driver in roadway diagnostic tool with 5 Replacement Mouthpieces Features Pocket Design: This breathalyzer is 2.2 x 3.1 x 0.6 inches, ultra-portable pocket and very easy to hold and carry. High Accuracy Breath Ethanol Tester: This Ethanol breathalyzer adopted a high-precision semiconductor Ethanol sensor, read out just 5 seconds! Digital display: The detector Tester uses a large digital display and red numbers to indicate at night, giving you accuracy for safe driving.It is convenient for you to use this Ethanol breath at night. 5 Mouthpieces Replace: We provie more than others, you can , maintain health and hygiene Ethanol test. Portable Breathalyzer: It is time to experience Ethanol tester, requires a breathalyzer that great for wedding, parties, or other activities, ensures your safe driving. Use instructions: 1. Press and hold the power button for 2 second, the Ethanol tester LCD with turn on with beep sound. 2. Warm-up mode countdown for 10 seconds. 3. Testing mode countdown from 10 to 00 warm-up mode, blow at this period. 4. Blow into the breath inhaler for 3-5 seconds with normal power a deep inhalation. 5. Read the test from the Ethanol tester LCD. 6. The Caution sign is displayed at: 0.020%BAC to 0.50%BAC(0.2g/l to 0.5g/l) 7. The Danger sign is displayed with a beep alert at: over or the same as 0.050%BAC(0.5g/l Specifications: Material: ABS Accuracy: 0.000~0.199%BAC Blowing Time: Within 10 seconds Size: 7.8x5.6x1.5cm / 3.1x2.2x0.6in Powered by 2pcs AAA alkaline battery(not included) Notes: 1. The first use of the tester or a long time no use, press the power button and retry several times if possible. 2. Repeatedly 2 or 3 times to obtain more accurate results. Package List: 1 x Digital Breath Ethanol Tester 5 x Mouthpiece 1 x User Manual