--Strong hydraulic shock damper with spring elastic adjustment ring for superior shock absorption. --Configured 46T 25P steel medium differential gear to provide a stable guarantee for the car powertrain. -- upgraded aluminum alloy C-Mounts and steering cup. --The sturdy body structure design and CNC machining chassis ensure that the car can withstand higher speeds and greater impact. --With an open battery compartment design it is compatible with most sizes of batteries on the market.