Transmitters and recivers!

[Rapidrory]

Other setups will work, but the DX6i is the go to standard TX. It has on board mixing and model menus and various other useful features. You can usually pick them up from Ebay for around £60-£70.

Lemon RXs are great. A lot of people are put off because they are so cheap (~£4 as opposed to ~£20 for a proper Spektrum RX), but I've found them to be much more reliable than Orange RX (another common choice) and have used them without issues in all my robots. The Lemon failsafes by taking the throttle to the position it was first bound in, and switching off all other channels. This is the same way most RX failsafe.