Features 1、This item has two-way large power silicon controlled rectifier and the current can be up to 20A, which is a good solution to over current of electric stove wire caused by low resistance during cooling 2、Convenient to use, simply connect input terminals to either live wire or neutral wire and output to load, then rotate knob to control voltage 3、With a wide voltage regulating range, the output voltage can be easily adjusted from AC 0‑ input voltage 4、Could be widely used as heat controller on electric stoves, water heaters, light dimmer on lamps, speed controller on small motors, or temperature controller on electric soldering iron, etc 5、The resistive load power should be less than 4000W, and power should be largely reduced(half or more) for inductive or capacitive loads, otherwise controller and load will burn out Specification Description: Features: This item has two-way large power silicon controlled rectifier and the current can be up to 20A, which is a good solution to over current of electric stove wire caused by low resistance during cooling. Convenient to use, simply connect input terminals to either live wire or neutral wire(220V) and output to load, then rotate knob to control voltage. Could be widely used as heat controller on electric stoves, water heaters, light dimmer on lamps, speed controller on small motors, or temperature controller on electric soldering iron, etc. The resistive load power should be less than 4000W, and power should be largely reduced(half or more) for inductive or capacitive loads, otherwise controller and load will burn out. Specifications: Input Voltage: AC220V Max Power: 4000W(resistive load) Size: 85 x 60 x 45mm / 3.34 x 2.36 x 1.77" Package Includes: Note: The maximum output voltage is equal to input voltage, e.g. if input 110V AC, the maximum output voltage is 110V AC; if input 220V AC, the maximum output voltage is 220V AC. Package List