All BRK Electronics smoke alarms meet UL 217 standard and are listed with the California State Fire Marshal. The 7010B AC-powered smoke alarm with photoelectric sensor includes these features: Photoelectric sensor which is more effective at detecting smoldering fires which smolder for hours before bursting into flame. Smoke particles of varying number and size are produced in all fires. If one unit triggers an alarm, all smoke alarms in the series will sound. The First Alert BRK 7010B emits loud 85dB audible alarm. Quick plug-in power connector for easy installation. The Frist Alert BRK 7010B hardwire smoke alarm with battery backup is packed with convenient features. Backed by 10 year limited warranty and tested to meet UL 217 standards 85 decibel alarm First Alert Smoke Detector First Alert 7010B Smoke Alarm, 120 V, Photoelectric Senso Smoke Detector Hardwired This First Alert 7010B hardwired smoke detector uses a photoelectric smoke sensor to detect smoke produced by smoldering fires, helping give you and your family... For maximum protection, use both ionization and photoelectric sensing technologies. Intuitive latching alarm indicator identifies which unit triggered alarm. This alarm is backed by a 10 year limited warranty and is tested to meet UL standards 217. Includes smoke alarm, mounting bracket, 9-volt backup battery and user manual. Amazon. The alarm can be interconnected with up to 12 other compatible smoke alarms and six compatible devices like bells, horns, repeaters and door closers. Mini Mounting Plate with 15mm Rod Clamp com The BRK hardwire smoke alarm with photoelectric sensor is designed to reduce common nuisance alarms. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety. BRK Electronics First Alert 7010B 120V AC/DC Hardwired with 9V End of life signal provides audible notice when the alarm needs to be replaced after 10 years of service. Inter connectable with BRK and first alert hardwired smoke and carbon monoxide alarms 120-volt VAC inter-connectable (with maximum 18 compatible devices). The latching alarm indicator will automatically identify which unit initiated the alarm if alarms are installed in a series – helping identify the initial location and source of an incident. It's an excellent choice for installations in or near kitchens, near fireplaces, or in hallways directly outside bathrooms, utility rooms, or other areas prone to steam. Features convenient 9 volt battery backup, silence/test button, dust cover, 85 decibel alarm The smoke detector also includes an optional drawer and mounting bracket lock to prevent tampering or removal of the 9-volt battery. Power indicators show which unit in the series initiated the alarm. This alarm is also a popular choice for hotel/motel applications.