Features: 1. High-Precision Measurement: Built-in sensor chip accurately determines BAC levels through breath analysis, reliably identifying drinking status for driving decisions. 2. Intuitive Display: LCD screen with tri-color indicators (green=sober, yellow=drinking, red=intoxicated) ensures instant result recognition. 3. Portable Design: Compact size for law enforcement/personal use. Simple operation with voice-guided breath test. 4. Alert System: Audible alarms activate for drinking/drunk driving detection, enhancing warning effectiveness. 5. Extended Battery: Type-C rechargeable lithium battery delivers long-lasting performance. Product Parameters: Sensor: Direct Thermal Alcohol Sensor Test Range: 0.000~0.199%BAC Accuracy voltage: ?��0.005%BAC Voltage: 3V Response Time: <5S Blowing Time: 10 seconds (usually 3-5 seconds will do) Warm-up Time: 15 seconds Product Size: 9.5*2.5*1.5CM Power Supply: USB Charging Interface Package Included: 1*Alcohol Tester