Breathalyzer Wine Tester Concentration Portable Test Blowing Drunk Driving LCD DisplayBlack and Silver

Energy saving, 2pcs AAA batteries can be used for one year, no need to replace frequently.
The LCD display allows you to see clearly, and the digital wine tester will automatically give you an audible alarm.
Automatic power off function, automatically shut down after 10 seconds of detection.
Built?in semiconductor wine sensor chip, for quick response and recovery.
Air blowing design, with 5pcs mouthpieces, can be used by multiple users.