Fangrui Product Details Features: 1. Warm Reminder: The Module Is An Accessory, Not A Finished Product. Please Have Certain Professional Knowledge To Use It To Avoid Unnecessary Losses. 2. When Using Large Currents, Please Properly Match Thickened Wires And Secure The Terminals. 3. The Module Without Constant Current Cannot Be Directly Used For Output Charging. 4. Minimum Voltage Drop: Minimum 5v, The Higher The Input Voltage, The Lower The Minimum Voltage Drop Increase. 5. Dc-dc High Power And High Voltage Adjustable Buck Module Description: 1. Name: Non-isolated Adjustable Buck Module 2. Input Voltage: Dc25-90v 3. Output Voltage: Dc2.5-50v Adjustable, Suitable For Applications Where The Output Voltage Is Lower Than The Input Voltage And Cannot Be Boosted. 4. Output Current: 35a, Used For Power Tools With A Current Of 50a, Long-term Use Of Large Currents Such As Modules 5. If The Temperature Exceeds 75 Degrees, Ventilation And Heat Dissipation Need To Be Increased. 6. Output Power: 1000wmax Note: Different Batches May Have