1、With a housing with a fuse regulator is safer, easier to install, more suitable for families and factories that are not convenient to install. 2、Beautiful, safe, convenient, high-quality products, definitely not comparable to ordinary bare-plate regulators. It will not rust and cause other appearance problems if it is used for a long time. 3、External use 1.5 thick aluminum plate and stainless steel open-die stamping, beautiful and generous, more suitable for family temperature regulation and industrial enterprises! 4、Using 1.6 thick FR-4 high temperature circuit board, the circuit design is reasonable, and the thickened welding circuit design is adopted, even if the large current is passed, it is enough to be safer and more reliable. 5、The circuit has undergone several technical improvements, and each accessory has been selected. It is now fully technically mature. The dual-capacitor design (safety capacitor + metal film capacitor) effectively absorbs surges and voltage spikes, and mor Features: With a housing with a fuse regulator is safer, easier to install, more suitable for families and factories that are not convenient to install. Beautiful, safe, convenient, high-quality products, definitely not comparable to ordinary bare-plate regulators. It will not rust and cause other appearance problems if it is used for a long time. External use 1.5 thick aluminum plate and stainless steel open-die stamping, beautiful and generous, more suitable for family temperature regulation and industrial enterprises! Using 1.6 thick FR-4 high temperature circuit board, the circuit design is reasonable, and the thickened welding circuit design is adopted, even if the large current is passed, it is enough to be safer and more reliable. The circuit has undergone several technical improvements, and each accessory has been selected. It is now fully technically mature. The dual-capacitor design (safety capacitor + metal film capacitor) effectively absorbs surges and voltage spikes, and more effectively protects the thyristor, making it more efficient and safer to use. Specifications: Condition:100% Brand New Material: PC Color: As shown in the picture Size: Approx.8.4*8*4cm/3.3*3.1*1.6in Weight: Approx.0.129kg/0.28lb Maximum power: 4000W (resistive load limit power), power consumption should be reduced for a long time. Long-term resistance load is recommended in 2000. Efficiency: over 90% Working voltage: AC 220V Adjusting voltage: AC 0-220V Voltage adjustment range: AC 0-220V, resistance load condition, start ten volts, callback can be 0 Package List: 1*Regulator Note: Because there was a manual measuring ,the size may has 1-2cm/inch difference. The color may be slight different due to the condition or light or different monitor.