An anomaly-free U(1) gauge extension of the standard model (SM) is presented. Only one Higgs doublet with a nonzero vacuum expectation is required as in the SM. New fermions and scalars as well as all SM particles transform nontrivially under this U(1). resulting in a model of three active neutrinos and one sterile neutrino. https://foldlyers.shop/product-category/sd-cards/