Fangrui Product Details Continuous Testing With Smart Sensing: The Professional Digital Breathalyzer Features An Intelligent High-sensitivity Chip That Allows For Continuous Testing Without The Worry Of False Blowing. It Eliminates The Hassle Of No-blow Air Flow Scenarios, Ensuring Quick And Easy Detection That Doesn't Waste Your Time. Intelligent Voice Functionality: Equipped With Intelligent Voice Functionality, This High Precision Alcohol Tester Clearly Announces Test Results And Can Store The Last 50 Testing Records. This Makes It Incredibly Convenient For Users To Receive Feedback And Review Their Test History. Traffic And Safety Indicator: When Alcohol Is Detected, The Traffic Home Investigation Alcohol Tester Flashes A Red Light As A Warning, Revealing The Presence Of Alcohol And Doubling As A Traffic . With A Single Button, It Activates A Cycle Of Red And Blue Lights, Providing A Vivid Safety Warning To Prevent Drunk Driving. High-definition Color Display: The Handheld Wearable Alcohol Analyzer Boasts A High-resolution Tft Color Screen, Making Readings More Comfortable To View And Ensuring Clarity Even In Night Vision Situations. This Enhances User Experience With Its Clear And User-friendly Interface. Long Battery Life And Loud Alert: Featuring A Large-capacity Lithium Battery, The Portable Alcohol Digital Detector Offers Over 15 Hours Of Continuous Operation On A Full Charge, Supported By A 500mah Lithium Battery. It Utilizes A Standard Type-c Charger For Convenient Recharging Anytime, Anywhere. Additionally, Its High-decibel Buzzer Sound Is Significantly Louder Than Ordinary Whistles, Ensuring That Alerts Carry Over A Greater Distance For Enhanced Safety. Voltage: 5v/1a Current: 150ma Operating Temperature Range: -5-+45 Storage Temperature Range: -20-+50 Detection : Semiconductor Gas Sensor Measurement Range Of Alcohol Concentration In Exhalation: 0-200mg/100ml Measurement Object: Alcohol Concentration In Exhalation Sensor : Built-in Battery: Lithium Battery (500mah) Colour:as Shown Material:plastic Size:150x28.7x30mm/5.91x1.13x1.18inch Package Contents: 1 X Alcohol Tester Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different Displays May Cause The Color Of The Item In The Picture A Little Different From The Real Thing. The Measurement Allowed Error Is +/- 1-3cm.