The Jemay GS518A Smoke Alarm is a reliable and essential home security device that provides peace of mind against potential fires. This wired smoke alarm features a photoelectric sensor, LED indicator, and a loud visual alarm. With a hardwired power source and included battery, this smoke alarm is designed to function effectively in the event of a fire. The sleek white design and compact size make it easy to install in any home. Manufactured by Siterwell Electronics, this smoke alarm is a quality product that ensures safety and security for you and your family. The packaging has been opened but never used. Thanks this is a pack of 2.