carbon monoxide & smoke combination alarms
kidde 21007309 nighthawk carbon monoxide alarm with digital display
nighthawk ac powered plug in carbon monoxide alarm with battery back up & digital display easy to install provides reliable protection against the dangers of carbon monoxide digital displyay feature adds an advanced level of protection showing co levels in ppm allowing you to see if levels change written information & instruction operation easy to understand small sleek design suitable for all living areas sku impr1839