Enhance your security system with the Dahua ASF921 Emergency Break Glass Door Release Button. This green button utilizes advanced photoelectric control technology to ensure reliability without mechanical failure. Crafted from fire-retardant materials, it promises easy installation and safe operation. Its versatile design includes normally open/closed functions for flexible application in various settings. Tested for durability, it withstands up to 500,000 uses, making it an essential accessory for any access control project. Upgrade your safety measures today!