If you have one source, and want to send that source's signal to multiple TVs, you need an HDMI splitter. Maybe that TV is in a different room, or maybe in the same room you have a TV to watch during the day and a projector to watch at night. A splitter will duplicate a signal and send it out through multiple HDMI cables.
2/4/8/16 Ports HDMI Splitter 4K 60Hz with HDR for DVD Player TV Box
SKU: HSP0102A1U
Sale priceFrom $39.99