This new Powrtrol control is a solid-state, proportional-voltage power control that provides precise manual control of heating mantles, tapes, cords, and other resistive loads. The output range is conveniently adjustable from 5-100% of rated voltage. It can be mounted to lattice work or used on a bench top. With lighted on/off power switch, circuit breaker protection, 3-wire load receptacle, and 3-wire line cord with molded plug. Dimensions: 4" x 4" x 3-3/8".