I needed one black tiddledywink (not provided) to use Dr. Feickert Analogue's three-speed, two-motor, two-armboard Blackbird turntable. The tiddledywink was for covering the Blackbird's painfully bright power-on LED so that it didn't blind me when I cued up a record. The first night, in my dark listening room, this tiny indicator sprayed the wall behind and the ceiling above with more light than a bright-emitting 845 vacuum tube.