Features: Efficient and energy-saving, adjustable speed, suitable for single-phase motor 220V. Adopting advanced frequency conversion technology to achieve precise control of motor speed. Equipped with multiple Protections functions for stable and safe operation, such as Over Current Protections,Over Voltages Protections,Overloads Protections, Overheats Protections. The control panel can be extended for external connection, making it more convenient to use. Widely used in various single-phase motor-driven equipment and machinery, such as water pumps, fan, compressors, etc. The speed can be adjusted according to demand. Specifications: Shell materials: plastic Type: 1.5kw/2.2kw/4kw 1.5kw/2.2kw Size: about 82x135x155mm/3.23x5.31x6.1in 4kw size: about 130x160x170mm/5.12x6.3x6.69inch Overloads capacity: 150% Starting torques: 0.5HZ/150% Frequency resolution: 0.01Hz Package Includes: 1pc Variable Frequency Drive Inverter note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to difference between different monitors, the picture may not reflect the actual color.