First Alert, Escape Light Smoke Alarm, Replacement For Old Sa150, Ionization Technology, New Contemporary Enhanced Smoke Gathering Design, Super Bright Escape Light Beam Lights Your Way To Safety Side Out Battery Drawer Makes Changing Batteries Easy, Now Runs On Only 1 9V Battery Included, Single Test And Silence Button, And Blinking Power Indication, Tamper Resistant Locking Pins.10 Year Limited Warranty, Not Permitted For Sale In Oregon.