Fangrui Product Details 1. This Product Is A Dc Step-down Module And Cannot Be Used For Ac Step-down. 2. The Maximum Power Can Reach 1500w. For Long-term Use, The Power Should Be Appropriately Reduced. 3. It Has A Step-down And Voltage Stabilization Function, And The Output Voltage Is Adjustable. 4. The Input Voltage Must Be Greater Than The Output Voltage, And There Must Be A Large Enough Input Current To Ensure The Output Voltage Is Stable. 5. The Input Voltage Is High. Pay Attention To The Risk Of Electric Shock During Installation And Use, And Do A Good Job Of Insulation Protection. Input Voltage:dc 25-90v Output Voltage:dc 2.5-60v (input Must Be Greater Than Output 3v Or More) Output Current:50a (max) (please Increase Heat Dissipation If The Module Exceeds 60 Degrees) Maximum Power:1500w (max) Operating Frequency:68khz Conversion Efficiency:up To About (efficiency Is Related To Pressure Difference And Use Environment) Operating Temperature:0-85 Degrees Celsius Due To Different Batches, There May Be Differences In Prod