Label:Yes 4,Good Quality: Using a 1.6-thick FR-4 high-temperature resistance circuit board, the circuit design is reasonable, and an enlarged and thickened solder joint design is adopted, which is sufficient to handle even high currents, making it safer and more reliable to use 1,SCR Voltage Regulator:This is an easy to use voltage regulator to control the brightness or speed of light 5,Resistive & Motor Load Compatibility:Widely used for resistance load such as heating wire, filament lamp and most(not all) single-phase AC motors. 3,Effective Heat Dissipation:Designed with a large heatsink to aid heat dissipation and support stable performance under load. 2,0-220V Adjustable Output:Supports output voltage adjustment from 0 to 220V, suitable for controlling lamps, small motors, irons, water heaters, and other resistive electrical equipment. Specification: Product Name: 6000W AC Voltage Regulator SCR Model: BTA41600B Maximum Power: 6000W (maximum power for resistive load. For long time use, please keep it in 3000W) Efficiency: >90% Working Voltage:AC 220V Adjusting Voltage: AC 0~220V (for resistive load, the voltage may not be 0V at first, you can turn it back to 0V) Size: Approx. 130 x 60 x 47mm / 5.1 x 2.4 x 1.9in,Knob inner hole 6mm / 0.24in Color: Silver Weight: 195g / 6.9oz (approx.) Package list: 1 xVoltage Controller Note:  1.Please connect to load first, then adjust voltage. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Please allow slight dimension difference due to different manual measurements. Thank you for your understanding.