Honeywell’s System Sensor i3 series smoke detectors represent significant advancement in conventional detection. The i3 family is founded on three principles: installation ease, intelligence, and instant inspection.
The 4W-B is a 4-wire, photoelectric i3 smoke detector.
NOTE: Four wire smoke detectors should be used as “replacement” models for older systems using four wire life safety devices. For new installations (modern panels) you should purchase a two wire model.