The Status 9V Photoelectric Smoke Alarm provides reliable protection for your home. Its 85dB alarm ensures a clear and loud warning, and a built-in low battery warning gives you advance notice to replace the battery. This alarm features a photoelectric sensor for effective smoke detection and includes a 9V battery. It also has an alarm test button for regular checks and a loud 85dB alarm to alert occupants. Status International (UK) Ltd is a family-owned business with over 20 years of heritage, based in Cleckheaton, West Yorkshire.