The EST Edwards SIGA-DDOS Fire Alarm Optical Duct Smoke Detector is a high-quality fire protection equipment designed for commercial and industrial facilities. Manufactured by the reputable brand Edwards, this smoke detector is a reliable choice for ensuring safety and security in any building. The SIGA-DDOS model uses advanced optical technology to detect smoke and fire quickly, making it a valuable addition to any fire alarm system. Made in China, this detector is a new in box product that offers peace of mind and protection against potential fires.