Hong Chang Fire Alarm Bell has UL ,ULC approval for years and smoke detector and heat detector has CE approval. With decades of experience in the fire alarm products and life safety industry, Hong Chang continue to devoted ourselves to the design, research and develop new products in hopes of achieving manufacturing excellence by developing high quality products. Hong Chang Fire Detectors are various including Ionization Smoke Detector, Photoelectric Smoke Detector , Smoke+Heat Combo Detector, Single-station Smoke Detector, Heat Detector(electronic type resettable), Rate of Rise Heat Detector, Fixed Temperature Heat Detector, provide wide range of fire detectors that can sense different origin of fire on the early development of a fire to protect and ensure our life safety and property. Hong Chang Fire Alarm Bell has UL ,ULC approvals and has been sold to numerous countries and customers for years and own a high reputation domestically and internationally with superior quality, low current , high dBA, loud and clear, available in various of VDC or VAC. In recent 30 years, Hong Chang produced a wide range of fire-protection series including Fire Alarm Control Panel, Emergency Lighting, Remote Indicating Lamp, Manual Call Point, Horn Strobe, Fire Detection, Alarm Bell for commercial building and home security to do the omnifarious fire protections.