Farenhyt IDP-PHOTO-IV Smoke Detector IvorySeries intelligent plug in smoke detectors are designed for both performance and aesthetics. A new modern, sleek, contemporary design and enhanced optical sensing chamber is engineered to sense smoke produced by a wide range of combustion sources in accordance with more stringent code standards. The IDP PHOTO W Series detector sensitivity can be programmed in the control panel software. Sensitivity is continuously monitored and reported to the panel.