LED Display: The breathalyzer features a backlit LED display for easy reading in low-light conditions. View test results clearly and quickly. Semiconductor Sensor: Equipped with a sensitive semiconductor sensor, this alcohol tester delivers fast and reliable results to help determine if it is safe to drive. High Accuracy: Designed to measure alcohol concentration in breath, the device detects levels from 0.00% to 0.19% BAC (0.00 to 0.95 mg/L). Provides consistent performance for personal use. Easy to Use: Simply press the button to power on the device, wait for the warm-up period, and breathe into the mouthpiece. Results are displayed within seconds. Automatically powers off after 5 seconds of inactivity to conserve battery life. Note: For accurate results, allow the device to warm up before each use. Wait at least 20 minutes after drinking before testing. Wait a minimum of 3 minutes between consecutive tests.