Photoelectric i3 Plug-In 4-Wire Smoke Detector with Heat Sensor & Sounder (12/24V)

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. Features: * 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