A repellent laser beam device for preventing pests, such as birds, from feeding on fruits in a field. The articulating clamp resides in a body of the spinal rod connector assembly and transfers a received downward force laterally to a spinal rod component of the spinal rod connector assembly which is configured to abut the spinal rod and hold the spinal rod between itself and a spinal rod holder of the spinal rod connector assembly. The free layer of the cell is etched back laterally from the reference layer, so that the fringing stray field of the reference layer is no more than 15% of the coercivity of the free layer and has minimal effect on the free layer. The rear spacer is assembled to the insulative housing and defining a number of positioning grooves for positioning corresponding upper terminals. A cathode is formed on its opposite planar surface, preferably covering substantially all of the surface.