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The BRK hardwire smoke alarm with photoelectric sensor is designed to reduce common "nuisance" alarms. 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. This alarm is also a popular choice for hotel/motel applications.
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.
120-volt VAC inter-connectable (with maximum 18 compatible devices). The alarm can be interconnected with up to 12 other compatible smoke alarms and six compatible devices like bells, horns, repeaters and door closers. If one unit triggers an alarm, all smoke alarms in the series will sound. Power indicators show which unit in the series initiated the alarm.
Quick plug-in power connector for easy installation.
9-volt battery backup for peace of mind during power malfunction.
Alarm indication which in an interconnected system, automatically identifies which unit initiated the alarm.
Optipath 360 technology allows 360-degree access to the layer of air on the ceiling or wall that carries the fire signatures (smoke, combustion particles and volatile components).
Single test/silence button which both silences a non-threatening alarm or low battery warning and allows you to test the unit's functionality.
Locking feature for tamper resistance.
10-year limited warranty.
Specs:
10-Years Limited Warranty
Model # 7010B
Weight 8.4
oz
Dimension 5.0"
dia x 2.1"H
Operating Voltage 120V
AC 60Hz w/ 9V battery backup
Operating Current .045
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 alarm Press 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 Photoelectric
Indicator Lights/Sounds
AC Power: Constant
Green LED
DC Power:
Intermittent Red LED
Local Alarm: Red
LED flashes rapidly
Remote Alarm: Red
LED out.
Listing Listed
to UL217 Standard
The price was good and I received the smoke alarm 
