3 GHz Quad Ground Block 4 Way Grounding High Frequency Commercial Grade Coax Cable 75 Ohm Mount Voltage Protection Outdoor TV Antenna Satellite Dish Digital Video Signal This ground block is used to ground upto 4 coax cables from a multi-switch, satellite dish or outdoor antenna Used to ground and help protect fragile electronics such as satellite receivers and televisions from damaging lightning strikes and power surges Ground block configuration way vary