Check the listing for details. Trimatron Rotary Fan Speed Control Switch, 5A, Full Range, Single Pole, Ivory. Condition: New. Listed at 9.99 USD. Trimatron Rotary Fan Speed Control Switch, 5A, Full Range, Single Pole, Ivory 6616-1 5 Amp, 120 Volt AC 60Hz, Single-Pole, Trimatron Full Range Electro-Mechanical, Rotary Fan Speed Control - Ivory Leviton Trimatron lighting controls are traditional rotary-style dimmers that are renowned for their compact, easy-to-install design and outstanding reliability. Trimatron dimmers are only half as deep as many conventional rotary-style dimmers, providing an easy fit even in shallow wallboxes. They are furnished with wire leads to further speed installation. Trimatron dimmers are available in single-pole (one location) and 3-way (multi-location) Deluxe Push-ON/Push-OFF versions for incandescent lighting and fan speed control. The Trimatron line also includes Rotary ON/OFF dimmers and Quiet Fan Speed Controls.