Description
First Alert 10 Year Battery 2 Pack Battery operated Combination Smoke and Carbon Monoxide Detector Item #503903 Model #X4311MV 56 Airflow (S H M L) CFM 588 530 440 341 56 Airflow (S H M L) CFM 588 530 440 341 Air flow (Direction) Vertical 4 way Vertical Sound Level (H M L) dB (A) 45 43 38 Outdoor Unit Dimensions (LxHxD) (inches) 31 7 8 x 23 x 11 Weight (lbs) 85 Accepts most 20 in