First Alert Plug-In 120V Electrochemical Easy To Read Digital Display Carbon Monoxide Alarm Specialty Cleaners and has a purple tint

and has a purple tint for visible verification that a primer has been used

eliminating scuff marks and scratches

Pre-assembled in several lengths

The 2-piece foam interior adapts to fit flanges that are above

medium bi-pin base

First Alert Plug-In 120V Electrochemical Easy To Read Digital Display Carbon Monoxide Alarm Specialty Cleaners and has a purple tintElectrochemical sensor Easy to read backlit digital display allows a quick view of current and peak CO levels. Plugs into any wall outlet and includes a battery back up for detection even during power outages EZ access battery door allows you to change batteries without having to dismount the alarm 5 decibel horn sounds if carbon monoxide levels are too high, and a test silence button silences the alarm and allows you to test its functionality