[Non-contact design]: The alcohol tester features a non-contact design, allowing breath analysis without physical contact for improved hygiene and safety. [Easy to use]: Simply exhale toward the device to measure breath alcohol concentration. Suitable for home, office, or social settings. [High Accuracy]: Equipped with a high-sensitivity semiconductor sensor for reliable alcohol detection. [LED Display]: Features an LED digital display with color-coded indicators: green (no alcohol detected), yellow (low alcohol level), red (alcohol detected above threshold). An audible alert sounds when the red indicator activates. [Portable Size]: Compact and lightweight design for easy portability. Rechargeable via USB cable—compatible with standard phone chargers and computer USB ports. Power input: DC 5V, 1A Measurement range: 0.00–0.19% BAC (0–1.9 g/L) Warm-up time: 10 seconds Required blow duration: 4–10 seconds Response time: