Features: Advanced flat-surfaced alcohol sensor. Quick reponse. Smart MCU control. Broad range. Auto warning beyond pre-set limit. Safe. Accurate. Dependable. Works EVERY time. Digital Output. Large LCD screen. Power saving design. Low battery alert. Instructions included. Five mouthpieces included. (Mouthpiece not necessary--simply blow into groves for 3-5 seconds) Compact and lightweight design--fits into purse or pocket easily. Easy to use. Specification: Directions detailed on 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: ¡À10% F.S Power by: 3x AAA batteries. (Batteries are not included.) LCD Size: 1.7" Color: Black Product size: 103 x 75 x 28 mm Product weight: 60g Package size: 158 x 105 x 50 mm Package weight: 133g Package including: 1 x Alcohol Tester 5 x Mouthpieces 1 x User Manual