Traxxas 6533 TQi 2.4GHz Micro Receiver with Telemetry & TSM (5-channel) TSM allows you to experience the power and speed of your Traxxas model by making it easier to control on slippery surfaces Braking is dramatically improved as TSM works to keep you arrow straight TSM can be fine-tuned (or turned off) for different surfaces by adjusting the multi-function knob on the TQi transmitter Five channel receiver accepts sensors to provide real-time telemetry on Traxxax Link app Receiver requires a Traxxas TQi radio with internet connectivity via the Traxxas Link mobile app