Features: The adjustable voltage range can be truly smooth and adjustable from 20V to 220V Easily control voltage, speed, temperature light via the adjustable rotary knob. AC 20V-220V stepless adjustable, zero hysteresis, zero latency, superior heat dissipation. Can be used in many places, such as electric furnace, incandescent lamp, baking lamp, PTC heating plate, electric iron, electric blanket, axial fan etc It is made of high quality material, with long serving life Specifications: Product model: KLC4000-D Input voltage: AC 220V Plug: CN standard plug Maximum power: 4000W (Suggest 2000-3000w) Adjustable voltage range: 20v-220v stepless adjustable (with load) Rated current 9A Maximum current 18A SCR model: BTA41-600B/800B Size: 13 x 9cm / 5.12 x 3.54in Weight: 475g Package included: 1 x Voltage Regulator Note: Please kindly make a note if you need any adapter. 1、The adjustable voltage range can be truly smooth and adjustable from 20V to 220V 2、Easily control voltage, speed, temperature light via the adjustable rotary knob. 3、AC 20V-220V stepless adjustable, zero hysteresis, zero latency, superior heat dissipation. 4、Can be used in many places, such as electric furnace, incandescent lamp, baking lamp, PTC heating plate, electric iron, electric blanket, axial fan etc 5、It is made of high quality material,with long serving life