Features: 1. This voltage regulator uses a high-current 23A terminal block for convenient and easy connection. 2. Includes an aluminum alloy heatsink for rapid heat dissipation and high efficiency. 3. This thyristor electric voltage regulator supports quick installation; simply drill three holes in your machine panel. 4. Voltage adjustment range: AC 0-220V. Adjusting from high to low to 0, then from low to high, results in approximately a 20V difference. 5. Resistive momentary load limit: maximum power 5000W, efficiency over 90%, highly practical. Specifications: Item Type: Thyristor Electric Voltage Regulator Housing: Aluminum Alloy Circuit Board: Resin Maximum Power: 5000W (resistive momentary load limit). Power should be reduced for extended use; resistive loads at room temperature within 2200W are recommended. Efficiency: Over 90% Operating Voltage: AC 220V Voltage Adjustment: AC 0-220V (from high to low to 0, from low to high is approximately 20V) Product Size (L x W x H): Approx. 84.8 x 70 x 40mm / 3.3 x 2.8 x 1.6in (excluding protruding knobs and connectors). Package List: 1 x Electronic Voltage Regulator 1 x Adjustment Knob Cover Note: Ensure the load is connected before adjusting the voltage. Thyristors are primarily used for resistive loads (electric heating wire lamps, etc.), and most single-phase AC motors can also be used.