The product is a set of 2 Johnson Controls 5951RJ Addressable Heat Detectors with base, designed for fire alarm systems in industrial and commercial facilities. These photo detectors are manufactured by the reputable brand, Johnson Controls. The set includes everything needed for installation and maintenance, making it a reliable choice for ensuring fire protection in large buildings or industrial settings. With free shipping included, it provides a convenient and efficient solution for enhancing safety and security within a business or industrial facility.