Description: It is safety and reliable to cope with large current. More efficiency and more safety.more suitable for family temperature control or speed control and industrial enterprises to use.Beautiful and easy, safe, convenient, high quality products. It will not rust after long time using.Mainly fit for the resistive loads, eg. lights. Circuit function: AC 0V-220V continuously adjustable, zero lag, zero delay, super heat dissipation. Circuit features: anti-surge, anti-spike, RC absorption multiple protection. Specification: New and high quality Circuit function: AC 0V-220V continuously adjustable, zero lag, zero delay, super heat dissipation Circuit features: anti-surge, anti-spike, RC absorption multiple protection Operating voltage: AC 220V Maximum power: 4000W Voltage regulation: AC 0V-220V continuously adjustable Specification and size: high temperature and fire resistant FR4 circuit board, circuit board size 60mm * 37mm high 45mm Color: as shown in the figure Package Included1Pc Note: Please refer to the measurement. Tiny measuring error is allowable in normal range. As different computers display different colors, thank you for your understanding, the actual product color may be slightly different from the image. _x000D_ _x000D_