Features Professional 4000W High Power: This electronic voltage regulator controller is designed for high-power applications, providing precise and stable voltage control for various devices. stable PCB Board: Constructed with stable PCB board and electronic components, ensuring long-lasting performance and reliability. Easy wire connection adds to the convenience. Versatile Control: Suitable for dimming, fan speed control, and temperature regulation, offering versatile applications for different devices and systems. Flexibly Adjustable: Easily adjust the voltage by gently rotating the knob cap, providing practical and convenient control without the need for additional elements. Ideal for Resistance Load: Perfect for resistance load devices such as electric furnace ments and incandescent light bulbs, providing efficient regulation and control. Specification: Product name: 4000W AC voltage regulator SCR model: BTA41-800B Maximum power: 4000W (suggest load within 2000W) Efficiency: between 90% Operating voltage: 220 V AC Regulating voltage: AC 0-220 V Size: 10 x 6.8 x 4cm / 3.94 x 2.68 x 1.57in Knob inner hole: 6mm Weight: 144g Package included: 1 x Voltage Speed Controller Note: 1. Load must be connected before voltage is measured 2. The product is mainly used for resistance load, such as electric furnace ment incandescent light bulb, etc. Package List