A window assembly that includes a motorized window shade mechanism. The window assembly includes two reversible motors that are disposed in, and at the top of, the window assembly. The window assembly further includes an opaque shade and a translucent shade. Each shade is independently raised and lowered with the motors by a separate gear and belt system positioned at the sidewalls of the window assembly, which are coupled to each other by rotatable shafts journalled into the bottom of the window. Each gear and belt system is driven by one of the reversible motors.