This is an antenna outlet that is used to pull the antenna cable into a room. (Supports 3,224 MHz) Operating frequency: 10 - 3,224 MHz (supports both terrestrial digital BS CS cable TVs). Ideal for those who want to adjust the viewing environment of "New 4K8K satellite broadcasting", which started in December 2018. SH Mark Registration: This is a "SH Mark Registration Device" that indicates that it is suitable for reception of super HD broadcasts. Please use SH mark registered equipment to receive and transmit 4K8K satellite broadcast. (Current pass through type) It can supply power from a TV or recorder to a satellite parabolic antenna. Power capacity: DC 15 V / less than 0.8 A (Swing Terminal): Input terminal (L type) swings 35 degrees left and right.Makes wiring connections easier in narrow boxes. Indoor Use Bulk Packaging (no instruction or other accessories)