First Alert SC9120LBL Hardwired Combo Smoke & Carbon Monoxide Alarm with 10 Year Battery Backup

First Alert SC9120LBL SC9120LBL Product Description The First Alert SC9120LBL Hardwired Combination Smoke/CO Alarm connects directly to your home electrical system. In the event of a power outage, the smoke/CO alarm is equipped with a 10 year lithium battery-backup. Integrating a Smart Technology system will reduce the likelihood of nuisance alarms triggering. A Latching Alarm Indication will remember which unit initiated an alarm. The perfect mount system features a gasket less base and a mounting bracket that keeps the alarm secure over a wide rotation range to allow for true alignment. Under normal conditions, you should not have to replace the battery for the life of the alarm. Designed to meet the latest construction requirements, the First Alert Combination Smoke and Carbon Monoxide Alarm detects two threats: smoke and carbon monoxide. Lights on the face of the alarm will tell you what the threat is, and false alarms can be silenced with a single button. Features: 10YR battery backup saves time and money on annual maintenance costsFeatures an electrochemical CO sensor and ionization smoke sensorIndicator lights display the presence of smoke or carbon monoxide; an 85-decibel siren provides loud warning upon detectionLatching alarm indicator - remembers which unit initiated an alarmIntelligent Sensing TechnologyTM helps reduce the number of nuisance alarmsPerfect mount - allows for easy alignment of alarmSingle button test/silenceDust cover10-Year limited warranty Specifications: Power Source: HardwiredBattery Backup: 10 Year LithiumSensor: Ionization and ElectrochemicalInterconnect: Can be linked with up to 18 units (12 Smoke, 6 CO/Heat/Relay)Intelligent Sensing Technology: Helps reduce nuisance alarmsNoise Output: 85 dB in a T3 PatternSingle Button: One press to silence and test alarmEasy Installation: Perfect Mount System includes Gasketless BaseTamper Resistant: Includes Locking PinsDust Cover: Keeps alarm clean during constructionImproved UV Resistance: Keeps alarm from discoloring over timeStandards: UL 217 and UL 2034Warranty: 10 Year LimitedProduct Dimensions (LxWxH): 5.6 x 1.9 x 5.6 in.Product Weight: .7 lbs. About First Alert: First Alert's Precision Detection advanced sensing technology meets new UL 217 8th Edition standards requiring smoke alarms and combination smoke & carbon monoxide alarms to reduce nuisance alarms and detect smoke from synthetic materials. First Alert’s Precision Detection alarms provide advanced and reliable fire protection to help protect what matters most.