Built for the extreme RV environment. One-touch test/reset button. Alarm can be muted during ventilation, but will re-alarm if hazardous conditions recur. Fits all Fleetwood RVs. Replaces CCI controls models 7770 and 7773. UL and CSA listed. 12V wire-in. 1 year warranty. Flush mount: 6-3/8 in.W x 2-7/8 in.H x 1 in.D. Surface mount: 6 in.W x 1-7/8 in.H x 1-1/2 in.D.