Kidde Smart CO Alarm with Air Quality Monitor, WiFi 10-Year (KN-COP-DP-10YL-AQ-WF) replacement-part Mode two: a 501 retainer

Mode two: a 501 retainer holds it on a 3M 603 filter adapter

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The Moldex 7740 IonicAir uses the Moldex bayonet connection

We do not list a shackle dimension or body material we cannot confirm from the product data

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Kidde Smart CO Alarm with Air Quality Monitor, WiFi 10-Year (KN-COP-DP-10YL-AQ-WF) replacement-part Mode two: a 501 retainerEDITORIAL REVIEW: 4. 5 5 WC Safety Review the Kidde smart CO alarm with air quality monitor Editorial assessment by Steven Eaton, WC Safety editor, based on published Kidde specifications and category fit. We did not laboratory test this product. CHECK PRICE ON AMAZON SHOP SMART CO ALARMS As an Amazon Associate, WC Safety earns from qualifying purchases. Full affiliate disclosure. Kidde Smart CO Alarm with Air Quality Monitor, WiFi 10 Year (KN COP DP