ITEM NAME:DC-DC Step-Down Power Supply Module Adjustable Voltage Buck Regulator Board Product Description Description: DC-DC Step-Down Power Supply Module XL4016E1 8A Adjustable Voltage Buck Regulator Board Description: 1. Please keep the input and output voltage difference above 2V. 2. Long running current is recommended within 5A. If the power is too large, please increase the fan or other ways to enhance the heat dissipation. 3. This module is a buck module, not a boost module. 4. This module has reverse connection protection 5. Product Size: 60 X 38 X 25mm/2.36 X 1.5 X 0.98" 6. Packing Weight: 41g Notes: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow 1-3mm measuring deviation due to manual measurement. Included: 1 X DC-DC Step-Down Power Supply Module.This module is a buck module, not a boost module. This module has reverse connection protection. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures.