1、GOOD HEAT DISSIPATION: Using 24V DC cooling fan, external aluminum heat dissipation base, bring efficient heat dissipation 2、2 LAYERBOARD: Simplified layout with double layer board design, PCB board is treated with three proof paint, possess simple structure and low failure rate 3、HIGHLIGHT DIGITAL DISPLAY: Variable frequency drive using humanized operation, highlight red digital tube display, avoid misoperation, very practical 4、FIRE RESISTANT ABS MATERIAL: Pay attention to safety, ABS fire resistant and heat resistant plastic material shell, the terminal is fully surrounded by design to avoid the danger of electric shock 5、STABLE PERFORMANCE: Input voltage is 380V 50‑60Hz, output voltage is 380V 0‑650Hz, rated power for 2.2KW, rated current for 5A