Compact and portable design - Easy to carry in a pocket or bag and use on the go. This breathalyzer provides reliable detection anytime and anywhere. High zero sensitivity with anti-interference - Features high zero sensitivity and a strong anti-interference function for precise, stable results and reduced false readings. LED digital display - Clear, easy-to-read LED readout lets you measure your alcohol level quickly and stay informed while on the move. Long battery life - Powered by a 300 mA battery for stable performance and longer use time between charges. Use scenarios - Before driving: quickly check your blood alcohol level to assess whether it is safe to operate a vehicle. - At events or gatherings: discreetly test yourself to monitor your level as you socialize. - During travel or commuting: test in different locations to verify your status before getting into a vehicle or making a decision about transportation.