Variable Voltage Regulator 120V 15A, 4000W AC Motor Speed Controller for Fans & Brushed Power Tools with Overload Protection, Dimmer & Temperature Control

Powerful 4000W Capacity with Smart Protection: Variable voltage regulator handles up to 4000W peak power (2000W resistive/500W inductive load); built-in overload protection automatically cuts off power at 10-15A to protect thyristors from surges, spikes and overheating.
Precise Stepless Voltage & Speed Control: Smoothly adjusts output from 0-110V AC with zero hysteresis and instant response; voltage regulator perfect for continuously regulating fan speed, tool RPM, heat intensity or light brightness without delay or flickering.
Safe & Durable Flame-Retardant Design: AC motor speed controller has thickened, fire-resistant plastic housing that resists high temperatures, rust and electrical stress; includes power indicator light and multi-purpose outlet for convenient monitoring and use.
Wide Compatibility: Designed for brushed motors only: The voltage regulator compatible with most AC fans, electric drills, soldering irons, heating rods, incandescent/halogen lamps and simple resistive devices. Not for capacitor-run motors, LED drivers or smart electronics.
Easy to Use with Clear Usage Guidelines: Fan speed controller plug-and-play with standard US 120V outlet; turn knob to adjust. Note: Avoid use with LED bulbs, induction cookers, rice cookers, water pumps or any device with internal circuit boards. For loads >1000W, start at 0 to prevent inrush current damage.