One major upgrade is the advanced gyro unit (MZW431) that can be mounted on the Mini-Z AWD Sports, is also able to be mounted on the MINI-Z Racer Sports 2 MR-03. The gyro’s sensitivity can be adjusted through a volume control installed on the chassis. Redesign of the steering control setup to accommodate the gyro has resulted in higher degree of steering precision compared to the previous model. In addition, when used in conjunction with the KT-432PT transmitter (sold separately), the gyro sensitivity can be adjusted directly from the transmitter, regardless of the volume setting on the chassis. The same applies to steering force settings, which can also be adjusted from the KT-432PT transmitter. With these two functions, precise setting can be achieved to optimize steering feel to your individual driving style. The MR-03 chassis lays the foundation for the new racing experience of the MINI-Z Sports 2!Features Perfex KT-19 transmitter. Steering volume adjustment possible.Factory