The alarm button Release Emergency Break Glass helps to save lives in emergency situations. Support Electric Control or Access Control System. Made of flame-retardant PC material, very convenient and safe. Witnesses only need to break the panel glass of the fire safety alarm button to send the fire alarm signal to the controller and send part of the fire alarm signal. It is a better protector at home, shop and other places, and if they take preventive measures and prepare in advance, it is much better for the public and for us. Random delivery of old and new versions​ This product is very cost-effective, it can help you through the difficult time in the event of an emergency, the is very simple, very practical, cheap, like to take it away. We solemnly promise you that if you find problems with the product itself, you can contact us in time. we will definitely give you a reply in the first place and return it for you. please feel free to use it., Weight: 0.330693393 Pounds, Manufacturer: Sonew