Feature:1. This wine tester uses highly sensitive semiconductor wine sensor. 5 seconds later after blow, you can get a test result to judge whether you can drive or not.2. The portable wine tester comes with a USB cable. You can recharge it by connecting the cable to your car charger or phone charger.3. Non‑contact design,you use this wine tester without extra mouthpiece, and your mouth doesn't need to contact the tester to get a result.4. The wide‑opened wine tester can gather more you breath out for more accuracy. Please use it 25 minutes after drinking.5. Easy to use, press the power button for 2 seconds to start the professional wine tester, wait for 10 seconds for warming‑up, then blow to tester mouth for 3‑5 seconds, the result will be showm within 5 seconds, and then it will be displayed on the LCD screen for 10 seconds.Specification:Condition: 100% Brand NewItem Type: Wine TesterMaterial: ABSColor: BlackSize: Approx. 8.5x2cm / 3.3x0.8in Weight: Approx.122g/4.3ozBuilt-in Battery: 300mah polymer lithium batteryBeeping and Lighting Warning:Lower than warning value ( 0.08%BAC): Red indicator lights up and beeping rapidlyPackage List:1 x Wine Tester1 x USB CableNote:1. Please allow 1‑2in error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.3. In order to make the test results more accurate, please test with the wine tester 25 minutes after drinking; please wait for more then 3 minutes before the test to get the precise testing result.