Electric Voltage Regulator Motor, Speed Controller Dimmers. Specifications: Product Name: 4000W AC Voltage Regulator Size: Length: (L*W*H): 85*55*38mm / 3.3 * 2.2 * 1.5 Inches ,knob Hole 6mm. Maximum Power: 4000W (resistive Load Limit Power), Long Time Should Be Reduced Power Use. Long Time Resistance Load Recommended Within 2000. Efficiency: More Than 90% Working Voltage: AC 220V Adjust the Voltage: AC 0-220V Voltage Adjustment Range: AC 0-220V, Resistive Load Conditions, Starting a Dozen Volts Package Included: 1 X4000W 220V AC SCR Voltage Regulator Dimmer Thermostat Electric Motor Controller . We are an international based seller that will ship your order from abroad, please at least a minimum 14 working days for delivery right now due to the ongoing delays in shipments globally.