A DC‑to‑DC step‑down board based on the XL4015 module, intended for lithium battery projects and experimental modules. Input voltage range is 4‑38 V, with dissipation ratings of 5 A or 12 A depending on configuration. Operating temperature range is -40 to 185 °F. The module is new, comes as a module package and can be customized. Brand WAVGAT.