Features:_x000D_ _x000D_ The item is a professional and practical 4000W high power SCR electronic voltage regulator controller _x000D_ The Voltage Controller is mainly made of durable PCB board and electronic components, and convenient to connect wire _x000D_ It is suitable for dimming, speed and temperature control. _x000D_ Gently rotate knob cap, can adjust flexibly, do not need to add any element, the product is practical, convenient. _x000D_ _x000D_ The product is mainly used for resistance load, such as electric furnace filament incandescent light bulb, etc. _x000D_ _x000D_ _x000D_ Specifications: _x000D_ Product name: 4000W AC voltage regulator_x000D_ SCR model: BTA41-800B_x000D_ Maximum power: 4000W (suggest load within 2000W)_x000D_ Efficiency: < 90%_x000D_ Operating voltage: 220V AC_x000D_ Regulating voltage: AC 0-220v _x000D_ Size: 10 x 6.8 x 4cm / 3.94 x 2.68 x 1.57in _x000D_ Knob inner hole: 6mm_x000D_ _x000D_ Weight: 144g_x000D_ _x000D_ _x000D_ _x000D_ Package included: _x000D_ 1 x Voltage Speed Controller _x000D_ _x000D_ _x000D_ Note: _x000D_ 1. Load must be connected before voltage is measured_x000D_ 2. The product is mainly used for resistance load, such as electric furnace filament incandescent light bulb, etc.