The product can be connected with an external controller to realize infinite speed regulation control by 0-5V/0-10V analog voltage input and 0-20mA current signal input. Frequency converter has quick start-stop response and high low speed torque.The internal protection function of the product has such protection functions as under-voltage, over-voltage, over-current, over-heat, etc. When short-circuit occurs, it stop immediately to the host (short-circuit protection).The maximum output frequency of the converter is 0-400 Hz. Frequency converter with multi-function relay transmission, PID function, constant pressure watersupply function. Inverter built-in temperature detection, internal self-cooling function for the external environment requirements are low.The additional control panel is equipped with external fixed casing support and 1 meter long connecting wire. Specification: Name: Variable Frequency Inverter Color: Black Adapt motor power: 2.2kW Scope of application: Universal Rated current: 20 (A) Rated input voltage: Single-phase AC 220 V Power output phase: three phase Supply voltage: Low Voltage Filter: No Control mode: V/F open loop Output voltage regulation: PWM control Colour:black Material:Plastic + metal Size:about 160 x 120 x 95mm Package Contents: 3 x Variable Frequency Drive Inverter Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.