Rear-drive chassis with emphasis on driving The MINI-Z RWD series combines the rear-drive chassis with the Syncro KT-531P transmitter. LED light unit set (No.MZW429R) sold separately cannot be installed on the McLaren Senna GTR. The MINI-Z Racer is fully established as an R/C model that anyone can start with just eight AAA batteries. The MINI-Z Racer Sports MR-03 Readyset, which was introduced in 2013, has been redesigned based on the concept of "making it easier and more enjoyable for a wider range of users. The newly developed transmitter and a scale body that realistically reproduces popular car models have been combined into the new "MINI-Z RWD Series" set. The most significant topic is the adoption of the new Syncro KT-531P transmitter. In addition to steering trim and throttle trim, dual rate and LED control functions are provided, and the steering wheel is equipped with a sponge as standard for a better fit during control. A factory-assembled body is also included, with a display-model-like finish that adds to the pleasure of displaying the model. The chassis is based on the proven MR-03, which is known for its durability and reliability as well as running performance. In addition, a new circuit board with a completely redesigned control program provides linear handling in response to steering and more controllable behavior when the optional gyro unit (MZW446) is installed. This is the ideal package for a "first R/C car," so why not start your R/C life with this series? The Syncro KT-531P transmitter uses FHSS 2.4GHz and is not compatible with conventional ASF/MHS/FHS 2.4GHz systems.