feature: Advanced Flat Alcohol Sensor Quick response Intelligent MCU control wide range Automatic warning for exceeding preset limits safe precise credible works every time digital output Large LCD screen Power saving design Low battery alert Include instructions Includes five mouthpieces ( no mouthpiece required - just blow into it for 3-5 seconds) Compact and lightweight design - fits easily into a purse or pocket easy to use Specification: Directions detailed on the screen: wait, blow, test, read Range: 0.00-0.20BAC%; 0.00-2.00g/L, 0.00-2.00BAC; 0.00 to 1.00mg/L; 0.00-200mg/100mL Alarm level: 0.05BAC%; 0.50g/L; 0.50BAC; 0.25mg/L; 50mg/100mL Accuracy: 10% FS Power supply: 3 AAA batteries (batteries not included) LCD size: 1.7" Colour: Black Product Dimensions: 103 x 75 x 28 mm Product weight: 60g Package Dimensions: 158 x 105 x 50 mm p> Packing weight: 133g Package includes: 1 x Alcohol Tester + 5 Mouthpieces