The Wall Mounting Kit is available for use with the GDS3700 series Video Door Phone. This mounting kit allows the GDS3700 to be mounted flushed within a wall rather on the surface of the wall. It supports solid wall, stud and drywall (hollow wall) installation. When installing the GDS3700 series or the In-Wall Mounting kit, please follow local building and electrical code. The device is suggested to be installed with the bottom of the device 50-55 inches above the ground.