【High Precision Sensor】Equipped with the latest generation of high-precision sensors, providing accurate results within 3 seconds. 【Dual Testing Modes】Offers precise mode with mouthpiece for accurate detection and quick mode without mouthpiece for multi-person screening. 【Portable Design】Compact and lightweight, similar in size to a smartphone for easy carrying and use on-the-go. 【Durable Construction】Made of ABS material, ensuring durability and resistance to accidental drops. 【User-Friendly Features】Includes removable battery compartment for quick battery changes, voice prompts, and buzzer alerts for ease of use. 【Wide Detection Range】Measures breath alcohol concentration from 0 to 200mg/100ml with high accuracy. 【Visual Indicators】Features 3 LED color indicators for clear result interpretation. Specifications: Battery: 3 AAA batteries (not included) Dimensions: 135mm*64mm*25mm (length-width-height) Exhaled breath alcohol concentration measurement range: 0~200mg/100ml