With 8-segment programmable, multi-stage speed control, has torsion or speed control mode optional. Comes with standard RS485 RTU mode, 0-5v/0-10v/4-20ma/0-20ma multiple analog input and output. With PID control, constant pressure water supply, wind pressure and constant pressure control, low noise, low electromagnetic interference and other functions. The built-in filter can suppress high-frequency harmonics, reduce the impact of harmonics on the power grid, and reduce interference. Provide protections against overcurrent, overvoltage and undervoltage, module failure, overheating, short circuit, phase loss, abnormal parameter adjustment, etc. Item Type: Frequency Converter Model: AT4-4000X(AT904-4KW). Input Voltage: Single-phase 220VAC 50/60Hz Output Voltage: 3-phase 0-380VAC 0-400Hz Maximum Output Current: 20A Adapted Motor Power: 4KW(6HP) Filter: Built-in filter Application: General DC Power Supply Nature: Voltage type Control Method: V/F open loop Output Voltage Adjustment Method: PWM control Material: ABS plastic shell Purpose: Control the start, stop, speed adjustment and CW and CCW of the motor to meet the conditions required for production or equipment use, widely used in fans, water pumps, air compressors, etc. 241 x 151 x 171mm / 9.5 x 5.9 x 6.7in. 1 x Frequency Converter. 1 x User Manual. This product is suitable for 3-phase motors with a voltage of 380V. Please confirm whether your equipment is compatible with the product before purchasing. We will reply your message within 48 hours. If you do not receive our reply within 48 hours, pls. Post a message again because sometimes our message system may block some emails. If you are satisfied with our service, pls. Our aim is to provide Level Customer Service, your recognition will encourage us greatly and serve you better. We strive to keep all our customers satisfy. We will do our up most to exceed your expectations in customer service, communication and dispatching of your orders.