Traxxas 6533X Receiver, micro, TQi 2.4GHz with telemetry & TSM (5-channel)TSM makes Traxxas vehicles easier to drive, particularly on loose surfaces TSM makes driving more fun by allowing the driver to accelerate harder and drive faster with much greater control TSM works to stabilize vehicles over rough surfaces as the gyro effect of the spinning front tires continues to steer when the vehicle is in the air TSM dramatically improves braking performance, preventing the vehicle from spinning out TSM allows faster cornering