Feature: Dustproof designSlip down the switch to blow air for alcohol testing, no need mouthpiece to avoid growth of bacteria, the test is healthier. High Accuracy breathaliserDesigned using a super sensitive semiconductor sensor system our portable breath analyzers,ensures your alcohol level is found out in seconds to be sure if it's safe to drive. Smart alarmWhen the testing result0.08%BAC (or 0.8g/l), it displays Danger on LCD screen with rapid tone sound and the red indicator is always on. when the testing result is within 0.02%BAC (or 0.2g/l) - 0.08%BAC (or 0.8g/l), it displays Caution on LCD screen with slow prompt sound and the yellow indicator is always on .When the testing result < 0.02% BAC (or 0.2g/l), the green indicator is always on and no sound. USB chargingAlcohol analyser convenient recharge by using USB cable.It can be charged by phone charger or computers' USB port. It lasts 300 times after being fully charged. Specification:Warm-up time: within 10 secondsPower supply: 200mA lithium batteryUnit: G/L, %BACIndicator light: green, orange, redMaterial:ABS Pakage include:1 x Alcohol Tester1 x USB data cable1 x Instruction Return Policy All of our items come with a 30-day free return policy. If you need to return, please contact us, let us know the detailed problem and send us some pictures for confirmation. We reserve the right to refuse any returns for objective reasons. Shipping Policy All of our items are shipped free with tracking numbers. Orders will be shipped within 3 working days upon receipt of payment. Most orders will be shipped within 1 working day. In most cases, shipping takes 8-12 working days.