Wireless Joey, are they all the same?

[bthomforde]

looking at adding a wireless joey to our RV, I see a few on Ebay, my question is, are all the wireless joeys the same or are there later versions I need to be looking at?

 

[Bobby]

looking at adding a wireless joey to our RV, I see a few on Ebay, my question is, are all the wireless joeys the same or are there later versions I need to be looking at?

Do you have a Hopper in your RV?