Fireguard Photoelectric Smoke Alarm 9 Volt SKU: 326034 MODEL: 141824 Error. try again later You've successfully joined the club $ 9 .99 each Mitre 10 MAvailable at Mitre 10 MEGA stores. Variants Includes FireGuard alarm, mounting bracket and screws, user instructions. Features and benefits Photoelectric Sensor. Hush/Test button. Loud warning tone 85db. Battery operated - 9 Volt battery included. Low battery warning. Easily Installed.