This item has two-way large power silicon controlled rectifier and the current can be up to 80A, which is a good solution to over-current of electric stove wire caused by low resistance during cooling It can easily adjust the output voltage on a scale of 0-100% (nonlinear) to power electric device Designed with large and thick heat sink that would enhance heat dissipation This voltage regulator is adjusted with button which is much more stable than potentiometer Voltage regulator has wave voltage absorbing circuit and effective protects large power silicon controlled rectifier, longer service life and more Material: ABS colour: white Package Contents: 1 x Controller 1 x Panel 1 x Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.