1. Portable Design with High Accuracy: Featuring a portable design and utilizing high-precision semiconductor technology, the alcohol breathalyzer offers the most accurate readings and alerts users when excessive alcohol levels are detected, making it ideal for on-the-go testing. 2. Two detection modes can meet the needs: the Precise mode requires the installation of a mouthpiece, and the detection is more accurate; the Quick check does not require a mouthpiece, which is suitable for multiple people to quickly check whether there is alcohol. 3. Equipped with smart chips and high-sensitivity sensors, the measurement is more accurate. 4. USB rechargeable lithium battery,800mAh the high-capacity lithium battery lasts long on a full charge. 5. Upgraded alcohol tester has additional memory function to store up to 50 groups of test results. Hygienic with Interchangeable Mouthpieces: The portable breathalyzer features washable and reusable interchangeable mouthpieces, making it convenient for multiple users while promoting hygiene. This allows for easy and responsible testing of your alcohol levels, keeping everyone safe. Product Name: High precision and rapid alcohol testing instrument for troubleshooting Product model: C02 Charging input: 5V/1A Built in battery: Lithium battery 800mAh Temperature range for use: -5 ℃-45 ℃ Storage temperature range: -20 ℃-50 ℃ Sensor type: Electrochemical alcohol sensor Measurement mode: Precision mode+Fast mode Test records: 50 records Measurement range: 0-400mg/100mL Display screen: TFT display screen Colour:Black Material:ABS Package Contents: 1 x Alcohol Breathalyzer 1 x Data Cable 5 x Mouthpiece 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.