Adjustable voltage range: The adjustable voltage range can be really smooth and adjustable from 10V to 220V, which makes it more suitable for devices that require low voltage to drive the heating wireDual capacity design: 220V voltage regulator adopts amperometric capacity and a metal film ability to absorb voltage surges and spikes, more efficient and safer to use Wide Application: Use to adjust the speed, brightness, voltage, temperature of various electronic devices, such as electric oven, water heater, lamps, small motor, etc.Why choose our AC voltage controller Design capacity Dual: Adopt amperometric capacitance and metal film capacitance to absorb surge and voltage spike, more efficient and safer to use.Durable performance: Using housing, which is made of 1 aluminum .5mm thickness and stainless steel, safe and convenient.Easy to use: Easily control voltage, speed, temperature and more via the adjustable rotary knob.Specifications:Color : silverMaterial: aluminum and stainless steelInput voltage: AC 220VVoltage Regulation: AC 10-220VPower: Max. 4000WEfficiency:andgt 90 percent Size: approx. 85 x 55 x 38mm or 3.3 x 2.2 x 1.5inch Package Weight: 127gPackage List:1 x Voltage RegulatorNote: The charged power cannot exceed the specified maximum power, otherwise it will burn the module and the electrical appliance. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.