Leviton Trimatron lighting controls are traditional rotary-style dimmers featuring an ultra-compact design that fits in even the tightest single-gang wallboxes and is suitable for multi-gang installations. Built-in radio/TV interference filter Quiet 1.5 A Trimatron fan speed controls are ideal for libraries, study rooms and any area where ceiling fan noise could become distracting Wire leads provided for fast, easy assembly and wiring