The USI Electric USI-1204 Hardwired Ionization Smoke and Fire Alarm responds quickly to fast-flaming fires to protect your family against deadly threats in the home. Perfect for new or replacement installations, the 120-volt AC hardwired alarm is suitable for houses, apartments and mobile homes. This alarm features a convenient silencer button to temporarily quiet a non-hazardous alarm and Smart Interconnect to connect up to 18 units. The 9-volt battery (included) provides continuous protection in the event of a power outage. Ideal for replacement of existing smoke alarms, this alarm features a large mounting plate for coverage of drywall impressions or old paint marks. The red LED light flashes when smoke is detected and the green LED light indicates that the power is functioning. Full dust and contaminant covers protect the device from spray applications, so you will not need to remove the alarm during any construction procedures. This smoke and fire alarm is UL Listed, California State Fire Marshal approved and Federal Housing Authority (FHA) approved to exceed industry standards. For maximum protection, install an alarm inside every bedroom, outside every sleeping area and on all levels of the dwelling. The USI Electric USI-1204 Hardwired Ionization Smoke and Fire Alarm comes with a 5 year limited warranty. USI Electric is a subsidiary of Universal Security Instruments Inc., a U.S. based manufacturer of high quality, easy-to-install home safety products. Founded in 1969, Universal Security Instruments has over 40 years of heritage in providing home safety products for families. With state-of-the-art manufacturing facilities, Universal Security Instruments continues to launch revolutionary new products and technologies with the mission of always working to keep families protected.