Product Information:WattStopper"s CI355 passive infrared (PIR) occupancy sensor automatically turns lighting on and off based on occupancy. The sensor mounts on theceiling with a flat, lowprofile appearance and provides 360 degrees of coverage. The CI355 is line voltage and operates at 120, 230, 277 or 347 VAC. The sensor uses passive infrared technology (PIR) to sense occupancy and automatically turn lighting on. PIR works by sensing the difference between infrared energy from a human body in motion and the background space. When no occupancy is detected for the length of the time delay, lighting automatically turns off. The CI355 works well in open office spaces, computer rooms, conference rooms, classrooms, and warehouses. It is a good choice for areas with high ceilings or with twolevel lighting and can be mounted though tile ceiling or through Octagonal JBox.. The convenient mounting system keeps installation costs down. It also eliminates the need for a power pack by using line voltage wiring. Features:#149; Detection Signature Processing eliminates false triggers and provides immunity to RFI and EMI#149; Walkthrough mode turns lights off 3 minutes after the area is initially occupied ideal for brief visits such as mail delivery#149; Builtin light level sensor featuring simple, onestep setup LED indicates occupancy detection#149; DIP switch simplifies sensor adjustments#149; Clip mounting system makes ceiling tile installation simple#149; Uses existing line voltage wiring and doesn"t require a power pack#149; Qualifies for ARRAfunded public works projects Specifications:#149; 120/230/277/347 VAC, 50/60 Hz#149; Time delays: Auto set, fixed (5, 10, 15, 20, or 30 minutes), walkthrough, testmode#149; Sensitivity adjustment: Auto set or reduced sensitivity#149; Multilevel, 360 Fresnel lens for superior occupancy detection#149; Builtin light level sensor works from 10 to 300 footcandles (107.6 to 3,229.