Hey there, welcome to the forum!

My Beetleweight uses a FlySky 6ch TX/RX which I've used in competition before (https://www.ebay.co.uk/itm/183168317619) which is fine for my purposes which is also reasonably priced. I would also recommend looking at the OrangeRX transmitter (and the various receivers that can be had with it) if you want something a bit more fancy.