The Module Does Not Come With Current Limiting Backfeed. If It Needs To Be Used For Output Charging, Please Add A Backfeed Diode. The Module Input And Output Does Not Have Reverse Polarity Protection Function. Please Confirm The Positive And Negative Before Wiring And Powering On! Modules Are Accessories, Not Finished Products. Please Have Certain Professional Knowledge When Using It To Avoid Unnecessary Losses. When Using Large Currents, Please Properly Match Thickened Wires And Tighten The Terminals. Name:Non-isolated adjustable buck regulator module Input voltage:DC25-90V Output voltage:DC2.5-60V, suitable for applications where the output voltage is lower than the input voltage and cannot be boosted. Minimum voltage drop: 5V, the higher the input voltage, the lower the minimum voltage drop will increase. Output current:50AMax Output power:1500WMax Fan temperature control:starts at about 50 Note:Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Colour:As Shown Material:PCB+Metal Size:Overall dimensions with shell: about 200x110x50mm Package Contents: 1 * Buck Module (With Housing) Only the above package content, other products are not included. Note: Light reflection 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.