First Alert Hardwired Photoelectric Smoke Alarm with 2x AA Battery Backup

BRK First Alert Hardwired Photoelectric Smoke Alarm with 2x AA Battery Backup - Model # SM6W01A The BRK First Alert Hardwired SM6W01A Smoke Alarm uses photoelectric smoke sensing technology to detect smoke. Photoelectric sensing technology is generally more sensitive at detecting large particles, which tend to be produced in greater amounts by smoldering fires, when compared to ionization smoke sensing technology. These types of fires may smolder for hours before bursting into flames. Sources of smoldering fires may include cigarettes burning in couches or bedding for example. Features: This model SM6W01A replaces the older First Alert model 9120BA. AC 120V Powered with 2 AA replaceable battery backup. Interconnectable with Silence Feature. Enhanced Interconnect and Latching features. Enhanced LEDs show alarm status for easy troubleshooting. SoftCue Replacement Reminders. Side-mount battery drawer for easy replacement. Optional Trim Ring to minimize touch-ups during installation. What's Included: ✓ First Alert Hardwired Photoelectric Smoke Alarm with 2x AA Battery Backup ✓ Limited 10 Year Warranty Specifications: ULC Approval Conforms to ULC S531 Manufacturer Warranty 10 Years Limited Model Number SM6W01A Smoke Sensor Type Photoelectric Sound Level 85dB at 10 feet Operating Temperature 40°F - 100°F (4.4°C - 37.8°C) Operating Voltage 120V AC 60Hz w/ 2 AA battery backup Power Source Hardwired Battery Backup YES Battery Replaceable YES Backup Battery Size 2 AA Dimensions, Exterior Height 1.76 Inches (44 mm) Dimensions, Diameter 5.2 Inches (132.08 mm) Net Weight .54 LB