High waterproof performance: This product is completely sealed with polymer coating and IP55 waterproof grade. Don't worry about the machine not working due to weather conditions. The integrated sealing structure is waterproof, dustproof and anti-mite, suitable for harsh environments. Intelligent detection: Equipped with intelligent chip, automatically detects environmental changes, automatically adjusts the transmitter power of the radio according to environmental conditions, effectively extending the life of the launch tube while reducing power consumption Warning distance: The maximum warning distance is 100 meters / 328 feet. It is suitable for all kinds of supermarkets, hospitals, schools and factories in an ideal and open environment. Durable: The alarm is made of high quality ABS. The surface of the product is painted, beautiful, anti-aging, and not easy to damage. Quality assurance: If you have any quality problems with our products or have any questions about the use, please feel free to ask if you can make a return if you are not satisfied with the purchase, we will do our best to satisfy them. your requirements until you are satisfied.