The product is a set of (5) Mircom MIX-2251B photoelectric smoke detectors. These smoke detectors are designed to detect smoke in the air and are an essential component of fire protection equipment. With dimensions of 6.10 × 6.10 × 2.00 inches and a weight of 0.3 lbs each, they are compact and lightweight, making them easy to install in various locations within a facility. The Mircom brand is known for producing reliable and durable fire protection equipment, making these smoke detectors a trusted choice for ensuring safety in commercial and industrial settings.