FEATURES : • Powered by SLC loop directly, no external power required. • Mounts in standard 10.16 cm square 5.398cm deep junction boxes. • Integral LED blinks to indicate normal condition. Illuminates steady when short circuit condition is detected. • High noise (EMF/RFI) immunity. • Wide viewing angle of LED. • SEMS screws with clamping plates for ease of wiring. • Opens SLC loop automatically on detection of short, preventing the short from causing failure of the entire loop. • Automatically resets on correction of short.