Abstract: An adjustable mounting apparatus for mounting electronic devices and objects of various sizes on a flat surface comprises a first bracket and a second bracket. Each of the first and second brackets comprise a substantially horizontal plate, a substantially vertical plate, a back plate extending substantially vertically from a second transverse edge of the substantially horizontal plate, and a reusable adhesive layer disposed at a rear portion of the back plate. The substantially horizontal plate of each of the first and second brackets comprise a first retaining abutment extending substantially vertically from a first transverse edge of the substantially horizontal plate. The substantially vertical plate of each of the first and second brackets comprise a second retaining abutment extending substantially laterally from a first transverse edge of the substantially vertical plate.