Electronic Voltage Regulator Temperature/speed Controller. Features: This Product is the Metal Shell Thickening of the Shell Material High Temperature Anti-flame No Rust the Internal Chip for High-power Imported SCR.?xa0 Product Design Compact and Lightweight Five-sided Cooling Mouth Does Not Heat No Deformation Safe and Durable. ?xa0The Shell is Equipped with a Universal Multi-purpose Socket and a Power Indicator Adjustable Knob Step Less Voltage Regulator Convenient and Quickn Application: Electric Stove Water Heater Heat Dimming Small Motor Speed Electric Iron Temperature Etc. So As to Achieve Temperature Dimming Speed Voltage Regulation Effect. Specification: Input Voltage: AC220V?xa0?xa0?xa050/60 Hz Output Voltage: 10-220V Adjustable (output Voltage is Less Than the Input Voltage) Maximum Power: 4000W (220V) Adjustable Voltage Range: 0-220V Promise Adjustable (with Load Conditions) Step-down Can Be 0 Boost Starting 20V or So Rated Current: 9A Maximum Current: 18A .