Innovation First VEX robotics controller used. Works. uses VEXnet.

VEX Robotics v5 6 Channel FM Transmitter Receiver w Freq Mod 61 No Battery

JR Sport S400 4 Channel RC Radio Control System Transmitter 72MHz FM With Box

VEX Robotics v5 6 Channel FM Transmitter Receiver w Freq Mod 61 (C4B2)

FrSky ACCESS R9M2019 Long Range Module System - USED

Microzone MC6C 2.4G 6CH Controller Transmitter Receiver Radio System for RC Airp

Futaba 3PK Super 2.4GHz Digital System — Pro-Spec Collector Bundle

Xtreme Link Telemetry Station 2.4GHz Remote Module Accessory RC System Sealed