BRK Electronics First Alert SA1839 120V AC Hardwire Ionization Smoke Alarm, No Battery Back Up (Upgraded to SMI100-AC)

The 9120 Series smoke alarms have been designed to install faster, perform better and be even smarter than before. These improvements help reduce nuisance alarms and save you time and money. Single button test/silence Latching alarm indicator - remembers which unit initiated an alarm Smart Technology - helps reduce the number of nuisance alarms Perfect Mount - allows for easy alignment of alarm Dust Cover Easy Installation/Maintenance - Preferred features include a large opening in the mounting bracket for easy access to wiring. Keyhole slots in the mounting bracket eliminate the need to remove the electrical box screws for installation. Locking feature provided to prevent theft of the unit. Connection to AC power is made with a "Quick-Connect" wiring harness. Installation is quick, easy and cost effective. 10-Years Limited Warranty Model # 9120 Weight 6.5 oz Dimension 5.6" dia x 2.0"H Operating Voltage 120V AC 60Hz Operating Current .04 amps (standby/alarm) Temperature Range 40°F (4°C) to 100°F (38°C) Humidity Range 10% to 90% relative humidity (RH) Audio Alarm 85dB at 10 feet Test/Silence Electronically simulates smoke condition, causing the unit to alarmPress and hold test/silence button Alarm Reset Automatic when smoke clears Interconnections Up to 18 units of First Alert or BRK Smoke, CO and Heat Alarms. Maximum of 12 smoke alarms. See user's manual for details. Smoke Sensor Dual chamber ionization Indicator Lights/Sounds AC Power: Constant Green LED Local Alarm: Red LED flashes rapidly Remote Alarm: Red LED out. Latching Alarm: Green LED flashes 2 sec. on/2 sec. off after local alarm Listing Listed to UL217 Standard