I got two TVs in my house, one on the first floor and the other is on the second floor. My Tv box is on the first floor. I want to buy A/V Sender and Receivers to share the TV signal. but I have found that there are many models for it. For example, the 5.8GHz Wireless A/V Sender 2 Receivers 200M 2.4GHz Wireless A/V Transmitter & 2 Receivers IR Remote 250M what is the difference between them?