Teckwe 1 Contact Type Blowing Type Alcohol Detector, High-Precision Portable Alcohol Detector, Professional Drunk Driving Detection Instrument, Equipped With Fast Response Digital LCD Display, Automatic Power-Off, Long Battery Life, Suitable For Precise Alcohol Detection Of Drivers, Law Enforcement Personnel, Workplace Safety Inspections, Parties, Weddings, Daily Use, With A Battery Capacity Of 300mAh