Digital display function: Quick and easy results with a clear digital display, reducing guesswork and helping you make informed decisions. sensitivity accuracy: Reliable, precise alcohol level readings with sensitivity to keep you informed about your sobriety status. Hygienic nozzle design: Hygienic nozzle promotes cleanliness and consistency in testing, giving you confidence with every test. Rechargeable and portable: Lightweight and USB rechargeable, this device fits in a pocket or purse for convenient on the go testing. Use scenarios Before driving after social events, use the device to check your alcohol level and determine if you should proceed. Before operating machinery, cycling, or engaging in activities that require alertness, verify your sobriety status with a quick test. While traveling or at gatherings, carry the device for fast, on site checks for yourself or others who may need a quick assessment.