• Size: 5-1/4" Diameter

• Battery Operated Photoelectric Smoke Sensor With Test Button

• Photoelectric Technology Is Generally More Sensitive Than Ionization Technology At Detecting Large Particles, Which Tend To Be Produced In Greater Amounts By Smoldering Fires

• Slim Unit, Just Over 1" In Thickness

• Single Button Test/Silence For Simplicity

• Loud 85dB Alarm To Assure Alarm Is Heard

• Can Be Mounted Unobtrusively On Wall Or Ceiling Easily

• End Of Alarm Life Signal Notifies When Alarm Needs To Be Replaced

• Power Source: 3V Lithium Battery (installed and sealed) Can Not Be Replaced

WARNING: This product can expose you to chemicals including diethylhexyl phthalate (DEHP) which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.