Accurate measurements enabled by smart chips and sensitivity sensors for reliable readings you can trust. USB rechargeable 800 mAh lithium battery provides longlasting power on a full charge. Portable design with accuracy: uses precision semiconductor technology to deliver precise readings and to alert you when excessive alcohol levels are detected, making it suitable for onthego testing. Two detection modes to fit different needs: Precise mode requires the installation of a mouthpiece for higher accuracy; Quick check mode does not require a mouthpiece and is suitable for rapid screening among multiple people. Practical attributes: compact and portable for easy carry, clear performance indicators, and dependable operation in everyday use. Use scenarios: After social events, test before driving to ensure safety. Onthego checks for individuals using a vehicle or operating machinery, to confirm compliance with safety limits. Quick group screening at gatherings or workplaces where multiple people need to be checked efficiently without sharing mouthpieces.