Welcome to our store! 1. High-sensitivity alcohol sensor for accurate and quick detection, no long wait times. 2. Compact size, lightweight, and portable for easy use. 3. Low power consumption; automatically shuts off after prolonged inactivity to conserve battery life. 4. Backlit LCD screen with 3 indicator lights: green (non-impaired), orange (impaired), red (intoxicated). 5. Dustproof design; slide to close the air intake for long-lasting use. Item Type: Breathalyzer Material: ABS Color: Black Size: Approx. 102x28x20 mm/4x1.1x0.8 inches (Please allow 1-2 mm difference due to manual measurement.) Sensor Type: Semiconductor Response Time: ≤ 20s Measuring Range: 0-19% BAC 0-1.9 g/l Indication Error: ± 0.01% BAC Operating Temperature Range: -5-45 ℃ Blowing Continuity Test: 5 seconds (flow rate: ≥ 10L/min) Built-in Polymer Lithium Battery: Battery Capacity: 200MAH Display: LCD Screen Alarm Mode: Buzzer Indicator Light Meaning: Green: Non-impaired Orange: Impaired Red: Intoxicated Charging Mode: DC 5V 1A, Micro 5p interface Steps: 1. Slide down the switch to display the WARM UP logo and blow for 10 seconds. 2. Display the BLOW sign and begin blowing. 3. Display the RESULT sign to read the value. 4. Display the OFF sign, shut down with 2 beeps. Package Includes: 1 x Breathalyzer 1 x Data Cable 1 x Manual 1 x Storage Bag Customer satisfaction is our top priority. If you encounter any issues with your product upon receipt, such as damage or incorrect quantity, please contact us immediately. We strive to provide the best after-sales service.