Install one of these simple and inexpensive SS-775 Smoke and Fire Alarms in each sleeping cabin, the galley, engine/generator room and electrical control room.The SS-775 Smoke and Fire Alarm is a general purpose smoke and fire alarm. The SS-775 is 9V battery operated for easy installation with no wiring and features a test button and 85 dB alarm horn.This smoke and fire alarm uses the ionization principle of detection for detecting fast-flaming fires which consume combustible materials rapidly and spread quickly. The SS-775 meets the requirement of UL 217. 9V battery included.Key FeaturesCompact design: Just 4-1/4" by 1-1/2"Quick and easy installationPower: 9V battery (included); No wiring requiredLow Battery Indicator, Silence featureTest Button is easily accessible on the cover of the alarmAlarm Horn: 85 dBA @ 10 ft.Listed to UL217 for RV useComplies with U.S. Coast Guard Sect. 28.325(b) and Sect. 181.450 inclusive