This remote display is an accessory for Johnson's 40-6791 red beam machine mountable detector. On many pieces of equipment such as skid steers, wheel loaders and backhoes, the machine mountable detector's best mounting location for visibility to the rotary and true indication of bucket height is not in the best position for the operator to see the detector's display. The remote display solves this issue by simply repeating the detector's display inside the operator's cab. This remote display operates off the power supply of the 40-6791 detector, which is either its own internal battery, or a 12 - 24 V connection. An included 32' cable makes the connection, and the display easily secures to your equipment with a single screw.