VREG2 are compact power adapter boards designed to convert a standard USB power source to a stable 3V DC output, suitable for use with Rosahl membranes. It features an onboard USB-C connector and provides the recommended constant current-limited output for all PD, RD, and RS small dehumidifiers, as well as the M-IJ, M-2J, M-3M, M-3J Series, and MDL-3 membranes.