The FXR90 comes standard with two mounting brackets installed on the reader that allow for flush mounting of the reader to a surface. These brackets require four #10 mounting screws.
For drywall applications, use correctly sized toggle bolts or drywall anchors.
Pre-drill a rectangle measuring 310 mm by 100 mm (12.20 in. x 3.94 in.) into the mounting surface prior to using mounting screws.
The mounting surface must support the full device weight and the weight of any attached cables.