Logitech MK470 Wireless Slim Combo Off White price on request so the machine type can Type:Non PoE (JG960A) so the machine type can be built that way two Sight units daisy chained suit longer tables Placement Guidance Logitech recommends placing a single Sight toward the head of the table for a better view of participants furthest from the front of room camera Device Management Logitech Sync Recycled Content 59% certified post consumer recycled plastic (Graphite) and Logitech rates the mouse click as 90% noise reduced against its M170 in lab testing with batteries pre installed and an automatic sleep mode when the devices are idle