Features:Advanced flat surfaced alcohol sensor.Quick response.SMD assembling, stable performance.Direct testing process LCD indication.Digital LCD display with blue backlight.Portable and fashion design.Audible warning beyond preset limit.Sensor fault self checking.Battery saved design,low voltage indication.Digital LCD display. Professional Breathalyzer TesterBreath Alcohol Tester safety for driversBreath Alcohol tester needs mouthpieceWarm up within 10 secondsBroad range.Auto warning beyond pre-set limit.Works EVERY time.Digital Output.Power saving design.Low battery alert.Instructions included.5 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. Specifications:Model: AT6000Detection Range: 0.00 - 0.20BAC% ; 0.00 - 2.00 g/L; 0.00 - 2.00BAC ; 0.00 - 1.00 mg/L; 0.00 - 200 mg/100mLAlarming Threshold: 0.05% BAC; 0.50 g/L; 0.50 BAC; 50 mg/100mLTest Accuracy: 10% F.S Working Voltage: DC 5V 3xAAA batteries(not included)Working Current: 120mA Environmental temperature:-10 to 50Relative Humidity 95% Display: 3 digits LCD display with blue backlightBattery Expectancy Time: 2000 TimesSize:103 x 65 x 27mm(LxWxH)Package Included: 1 X Alcohol Tester ,5 xFilter tips.