8 Pack System Sensor 2W-B 2WB i3 Series 2-wire Photoelectric Smoke Detector

Description

You are buying 8 units.  These units require a fire alarm/smoke alarm system to function.  They are not standalone units.
System Sensor 2W-B i3 Series 2-wire, Photoelectric i3 Smoke Detector
Specifications
Alarm Current:
130mA max., limited by panel
Detection:
Photoelectric
Dimensions:
2.0" (51mm) H x 5.3" (127mm) Dia.
Maximum Ripple Voltage:
30% of nominal (peak to peak)
Operating Humidity Range:
0% to 95% RH, non-condensing
Operating Temperature Range:
32° to 120°F (0° to 49°C)
Operating Voltage:
12/24 V non-polarized nominal, 8.5 min. to 35 max.
Sensitivity:
2.5%/ft. nominal
Standby Current:
50 µA max. avg., 100 µA peak
Weight:
6.3 oz. (178 g)
Wiring Gauge:
14-22 AWG
Wiring:
2-wire
Features:
System Sensor i3 series smoke detectors represent significant advancement in conventional smoke detection. The i3 family is founded on three principles: installation ease, intelligence, and instant inspection.
Plug-in detector line, mounting base included
Large wire entry port
In-line terminals with SEMS screws
Mounts to octagonal and single-gang back boxes, 4-square back boxes, or direct to wall or ceiling
Stop-Drop 'N Lock attachment to base
Removable detector cover and chamber
Built-in remote maintenance signaling
Drift compensation and smoothing algorithms
Simplified sensitivity measurement
Wide-angle, dual-color LED indication
Loop testing via EZ Walk feature
Built-in test switch
i3 Series Detectors:
2W-B 2-wire Standard i3 Detector
2WT-B 2-wire Standard i3 Detector with Fixed 135° Thermal Sensor
2WTA-B 2-wire i3 Detector with Fixed 135° Thermal Sensor and Sounder
4W-B 4-wire Standard i3 Detector
4WT-B 4-wire Standard i3 Detector with Fixed 135° Thermal Sensor
4WTA-B 4-wire i3 Detector with Fixed 135° Thermal Sensor and Sounder