Warm reminder 1. The pure radar speedometer is suitable for experienced drivers who are familiar with the road conditions. It works best for those who frequently travel on long-distance national and provincial roads or highways. 2. Some fixed speed monitoring points emit radar waves and the machine will announce them, but not all fixed points will do so. Fixed points such as those that take photos at traffic lights or other pressure-line types do not have radar wave speed measurement and are not within the working range of this product. Please be informed. 3. This model is an imported pure radar speed monitoring electronic dog. It continuously receives high-frequency radar waves during operation. 4. During long-term operation, it generates heat causing the machine's surface to reach around 40-45 degrees Celsius, which is within the normal range. If you cannot understand this, please be cautious when taking pictures and do not use it as a reason for returning the product due to quality issues. 5. The operating temperature of this product is -25℃ - 75℃. For long-term use, it is recommended to use the standard suction cup to hang it up, which is beneficial for ventilation and heat dissipation.