Adopts double insulation to prevent electric leakage in case of short circuit or SCR failure. Protects against peak voltage and electrical surges using RC absorption and a fuse. Aluminum housing provides durability; tin-plated terminals reduce heating under high current. Includes protective cap and secure connections; features a thicker, larger heat sink. Specifications: Operating Voltage: 220V AC Maximum Power: 4000W (with resistive load) Voltage Adjustment Range: 10V–220V Dimensions: 85 × 58 × 35 mm Protection Features: Spike protection, surge protection, RC absorption Usage: Adjustable power controller. Connect to lamps, household appliances, or electrical circuits. Adjust output using the control knob for dimming, speed control, voltage regulation, or temperature control. Common Applications: Electric ovens, water heaters, lamps, small motors, irons, etc. Package Includes: 1 × Voltage Regulator