Practical and portable – This breathalyzer has a compact and lightweight design, weighing less than 100 grams and easily fitting into a purse or glove compartment. Its travel-friendly size allows you to take it anywhere without adding bulk, while keeping it readily available for quick and discreet breathalyzer tests. Optimized power – This breathalyzer features a high-density battery that ensures long-lasting use and fast charging for over 300 tests, while the energy-efficient chip enhances portability and reliability in the field. High-visibility display: The 13 cm color screen with a backlight module ensures excellent visibility in all lighting conditions and improves ergonomics thanks to its integrated, multifunctional design. Instant alcohol detection: Thanks to a smart chip and ultra-sensitive analysis, the breathalyzer guarantees fast detection and flawless stability, making it ideal for reliably performing countless tests. English voice prompts: With English audio prompts and real-time updates, it offers reliable and consistent performance, even in low-light environments where accuracy is crucial. This breathalyzer features a precise digital display that effectively measures blood alcohol content, ensuring your safety. Suitable for both men and women, it can be used at home or in the car. The rechargeable design guarantees uncompromising performance. Product Name: Breathalyzer Material: ABS Dimensions: 3 × 15 cm | 1.18 × 5.91 inches Power Supply: Rechargeable via USB Features: High accuracy, contactless operation, English voice prompts Contents: Alcohol* 1 USB Charging Cable * 1 Note: Due to differences in lighting and screen settings, the product color may differ slightly from the image. Due to manual measurement, there may be a 1-2 cm size deviation. Instructions: Preheat: 1. Press and hold the power button for 2 seconds. After the voice prompt "Powering on," the tester's screen will activate. 2. A voice prompt "Please wait" will be heard, and the digital display "Preheating" will appear. Test: Once preheating is complete, switch to blow mode. When you hear "Blow" and the 10-second countdown appears on the screen, blow into the air outlet from the front for at least 3 seconds, then stop (do not blow into the air outlet with your mouth or touch it). Wait a few seconds, and the measurement result will be displayed and announced. (The weather forecast will be displayed.) Note: When the breathalyzer is removed from its packaging for the first time or is not used for a while, a large amount of gas and other impurities may adhere to the sensor. In this case, you will need to press the on/off button several times to clean the breathalyzer during preheating.