Steinel Professional Presence Sensors. 4 way and Hallway installation type. For USA electrical systems. I have 5 hallway and 7 Quattro in the boxes and never used. And 1 T-150 power pack. Only serious inquiries. These are for commercial purposes. But could be used for residential installations. They are priced at $80 on eBay . I have 1 of them hooked up and working on back porch of my place in Bismarck.