I have the FRSKY Taranis TX. Its 32 channels capability - not 16.
The Transmitter looks just like the JR and spectrum except it does not have a roller I think the case is made in the same factory.
The Taranis costs $175 and it compares to the Jeti that costs $1700.
It does have one serious problem. If you order one it will take 3 months to get it.