Description Mounting Rail: There is a mounting rail on the back of the frequency converter to make it easy for you to mount it on the wall. Knob: The knob allows you to precisely and infinitely adjust the output frequency. Wiring Letters: In order to avoid wrong wiring, the output and input wiring ports are printed with letter markings. Application This frequency converter is suitable for motors, drilling machines, pumps, fans, coolers, compressors, and other industrial machinery. Specification Color: Black Material: Plastic Input Voltage: 380V, 50/60Hz Output Voltage: 380V Power Supply Capacity: 4.0KVA Input Current: 5.8A Output Current: 5.1A Suitable Motor Power: 2.2KW/3HP Input Phase: 3 Phase Output Phase: 3 Phase Product Size: 11*8.5*14.5cm/4.33*3.3*5.71inch Package Size: 20*16.5*12.5cm/7.9*6.5*4.9inch Gross Weight: 1.2kg/2.6lbs Net Weight: 1kg/2.2lbs Package Included 1* Frequency Converter 1* English Instructions Notes 1. Motors with capacitors are not allowed to use this converter. 2. If the working environment is relatively humid, with water mist, water droplets or metal objects falling in, the machine will cause a short circuit. 3. If you need an external resistors, please purchase it separately. It is not included in the package. 4. Please allow the slight color difference caused by the shooting light and 1-3 cm error due to manual measurement, and make sure you do not mind before ordering.