Features: Can prevent voltage peaks and electrical overvoltages; RC absorption and fuse enhance the safety of use. Designed with a large and thick heat sink that would improve heat dissipation. The voltage regulator has a wave voltage absorption circuit and effectively protects the high power silicon controlled rectifier. This product is made of metal shell, temperature-resistant and . Wide Application: Electric Stove, Boiler, Lamps, Small Motor, Electric Iron, etc. Note: AC input. The voltage can only be adjusted when connected to a load; Mainly used for resistive load. Specification: Material: Metal Color: Black Input Voltage: AC220V Limit Voltage: 4,000W (Suitable for 2,000W-3,000W Resistive Load)Pressure Control Range: 0-220V Rated Text: 9A Current Limit: 18A Measurement: app.11.3x9.8x6.2cm/4.45x3.86x2.44in (LxWxH) Line Length: app.90cm/35.43in Quantity: 1 PcNote: No retail package Transition: 1cm=10mm=0.39 inch Please allow 0-1cm error due to manual measurement. Pls make sure you don't mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Included:1 x Voltage Regulator