I've looked, and can't find any requirement to buy any more! The Tx has 6 pot knobs as well as the usual 4 stick channels, so it looks as if it has at least 10 fully proportional functions. No good for submarines at 2.4Ghz, but it's not a bad price for such a specialist item… and voice/bluetooth as well!
It seems that the Tx provides 8 channels if used with a D8 receiver, 12 if used with an LR12 receiver, and the full 16 if used with a D16 receiver. There are 8 switches in addition to the 10 proportional functions, typically 3-position, which can all be defined in the mixer menu, and an extra DIY switch port which allows you to extend the number of switches.
Could be good for battleships?
Edited By Dodgy Geezer on 24/10/2015 23:34:39
Edited By Dodgy Geezer on 24/10/2015 23:35:36