5-36V wide voltage input, 5V or 3.3V output can be set, output current can reach 4A 3.3V or 5V step-down regulated output, can be by welding switching resistor Factory default is 5V output, input voltage range: 6-36V Can be changed to 3.3V output, input voltage range: 5-36V Using black immersion gold process, small size, easy to integrate and embed 5V mode (factory default) Input voltage: DC 6-36V Output voltage: DC 5V Working current: 0A-4A (up to 5A in extreme cases, but heat dissipation must be done well) Switching frequency: 500 kHz Conversion efficiency: 90% Type:Welded Colour:As Shown Material:PCB Package Contents: 1 * Buck Module 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.