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 . 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.