Goodday mate!
You bought a great Transmitter. I n the instruction booklet, that should be supplied with that transmitter should give that information. From what I looked up, it is a duplicate of the JR 9303, which is a 9 channel 2.4 GHZ Transmitter with 30 model memory and Model Match, which I don't think any other MFGR's can duplicate today. I had Spectrum DX7, and stepped up to the JR9503, which has 50 model memory plus backlight and other's. I can use all the RX's I had without switching to something else.
Anyway if ya buy a 9 channel Transmitter, but not going to use them all, then go with at least a 4 or 5 channel RX. I myself would but the AR 7000,( 7 channels)for a starter and go to theAR 9000for more channels. Sooner or later you will want more channels availible, so why buy one that limits the capaibility of tthe Transmitter? Why buy a 9 channel Transmitter and have a 3 channel RX??? I don't get it.
Just as a note, All JR ''s will work with Spectrumand vise versa but they have to be 2.4 GHZ.. Same thing.
When ya get a little bigger RX, that leaves you more options,like dual batteries, voltage moniters etc. if ya choose to do so.
Have a Great day! Fly .