The MINI-Z RWD MR-03 series replaces the MR-03 Sports 2 and is positioned slightly above the predecessor. Combined with the KT-531P transmitter and full ball bearing specifications, the MINI-Z RWD provides users with more values at the same price range. The KT-531P transmitter features soft foam steering wheel, which will give you a higher driving pleasure, and the transmitter is equipped with the throttle trim control knob, which was omitted from the KT-19. The RX unit is equipped with expansion ports for optional gyro units (MZW446). The gyro effect can be adjusted by turning the small volume on the RX board.