Intelligent Detection: This infrared alarm detector equipped with intelligent chip, automatically detects environmental changes, automatically adjusts the transmitting power of the radio according to environmental conditions, thus effectively extending the life of the launch tube while reducing power consumption. Warning Distance: This infrared alarm 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. Place of use: This invisible beam barrier IR motion sensor alarm is durable and can adapt to any various environments, suitable for factories, buildings, prisons, stadiums, hospitals, schools and other places. Adapts to Various Environments: The infrared sensor alarm is completely sealed with polymer coating and waterproof rating IP55. Dont worry about the machine not working due to weather conditions. The built-in sealing structure is waterproof, dustproof and tamper-pro