• Loud 85 decibel alarm
• Nuisance alarm reduction
• Advanced ion fire detection
• Oversized test button for easy activation
• Test button performs the following functions:
– Tests the units electronics and verifies proper unit 
operation
– Resets the unit during CO alarm
– Peak Level Memory (see page 16)
– Activates or Cancels Hush
®
Feature (see page 16)
• Mounting bracket designed for easy orientation
of the unit
• Green and red LED lights that indicate normal
operation and alarm status
– Green Light: The green LED light flashes every 30 
seconds to indicate the unit is operating properly 
and once every 2 seconds to indicate the unit is in 
HUSH
®
mode. The green light also flashes before a 
CO reading is taken and when any button is 
pressed.
–
Red Light: When a dangerous level of smoke or 
carbon monoxide is detected the red LED light will 
flash and the corresponding alarm pattern 
(depending on the source) will sound. If the unit 
malfunctions, the red LED light will flash and the 
unit will chirp every 30 seconds indicating a system 
problem.   
• Powered by three (3) AA batteries
• Battery lockout system that prohibits installation 
without using three batteries
• Tamper Resist Feature that deters children and others
from removing the alarm
5
Features