Note: Please allow 1-3mm difference due to manual measurement. Due to different display settings and lighting conditions, the actual color of the item may vary from the image. Thank you for your understanding. Specifications: Resistance materials: Metal and plastic Input voltage: AC 220V Voltage regulation: AC 50-220V Maximum power: 2000 W Dimensions: 48 x 56 x 28 mm Connect this device in series with a lamp or home appliance, then rotate the knob to adjust brightness, speed, voltage, or temperature. This device is designed for high power applications and is suitable for common household appliances or small industrial equipment. The voltage regulator features a two-way high-power silicon-controlled rectifier and a potentiometer with nuts, allowing direct use without additional components, making it convenient and practical. Compatible Appliances: Electric furnace, water heater, lamps, small motors, electric iron, etc.