A:Answer The LG 4K UHD HDR Smart LED TV - 55" Class (54.6" Diag), Model # 55UJ7700 has a built-in ATSC tuner that allows for reception of Over-the-Air broadcasts when an antenna is connected to it. IT has a 75 ohm, "F Type" coaxial connector in the back labeled Antenna/Cable In. If you click on the fith thumbnail image from the left for this unit on the Best But site, you can see the connector in the back of the TV...^IFV