Wide-wide-voltage regulator can be widely used as heat controllers on electric furnaces, heat controllers on the water heater, lighting in lights on the lamp, speed controller on small motors, or temperature controllers on the electric iron. So as to achieve the effect of lighting, temperature adjustment, pressure regulation, and speed regulation. Good performance-The stabilizer has a wave voltage absorption circuit, which can effectively protect the high-power silicon rectifier and the longer service life and durability. The range of adjustable is wide -a wide voltage regulation range, the output voltage can easily adjust from 50V to 220V. Note: Before trying to connect the controller, make sure that all the power supply is disconnected. Colour:Black Material:ABS Package Contents: 1 x Automatic voltage regulator 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.