Not really, those are basically "The Rabbitt"
Which works, but you need this $100 device for eache and every TV you own
My way uses the receiver in the TV (UHF/VHF) so all you need is a transmitter.
Now I have found some info and it appears to be illegal to transmit above a certain power/wattage, I just can't find what that is and what range that gives you.