UPGRADE VERSION: This breathalyzer adopts the built-in lithium battery as the power supply( Built-in 1000 mAh lithium battery); when it is fully charged, it can be used 3 months; One 39.37in micro USB cable included for charging and 10 replacement mouthpieces included for whole family or friends usage

SMART ALARM FUNCTION & ENERGY-SAVED DESIGN: (BAC can be set by yourself) when the test result is higher than 0.05% BAC / 0.5 ‰ BAC (factory default setting), the red light of digital breathalyzer flashes and a continuous drop sound is emitted to remind the user

ALCOHOL TESTER WITH 3 UNIQUE FEATURES: A) the breathalyzer test rating is adjustable with 6 common-used units (%BAC-US, g/l-EU, mg/L-JP, mg/100ml-CN, ‰BAC-RU, ‰prom-PL); B) CAUTION and ALARMING values can be set by users based on your own need; C) up to 32 recent testing records for your checking; the testing results ranging from 0.000-0.190％BAC / 0.000-0.950 mg / L with this Portable breathalyzer

NOTE: In order to make the test results accurately, please test with the alcohol breathalyzer 20 minutes later after drinking; please wait for another 3 minutes before starting the next test to get the precise testing result

WHAT YOU GET: JASTEK Breathalyzer *1, Mouthpieces *10, Caring bag*1, Micro USB Cable 39.37in (1 Meter), User manual *1. Our Alcohol tester provides the most accurate and convenient alcohol test, if you are not satisfied or have any quality problems, please feel free to contact us