【High Precision Alcohol Detection】Advanced semiconductor gas sensor technology provides accurate measurements of breath alcohol concentration from 0 to 200mg/100ml. 【Easy-to-Read Results】Features a clear LED display with green, yellow, and red indicator lights for quick interpretation of test results. 【Portable Design】Compact size of 99*48*23.1mm makes it easy to carry in your pocket or car for convenient use anywhere. 【Multi-Purpose Use】Ideal for personal use at home or in vehicles to ensure responsible drinking and driving. 【Built-in LED Flashlight】Includes a white light emergency LED for added functionality and safety in low-light conditions. 【User-Friendly Operation】English voice prompts guide you through the testing process for simple and straightforward use. Specifications: Material: ABS Voltage: 4.5V Current: 120mA Battery: 3 x 1.5V AAA battery (not included) Using temperature range: -5℃~+45℃ Storage temperature range: -20℃~+50℃ Indicator: Green/Yellow/Red Voice: English Detection method: Semiconductor gas sensor Breath alcohol concentration measurement range: 0-200mg/100ml Measurement object: Breath alcohol concentration LED emergency light: White light Size: 99*48*23.1mm/3.86*1.87*0.9in