Get on the tires, plug the batteries, and get racing with the Micro RS4 car. The Micro Pro Control electronic speed controller of this HPI racing car needs no set up as it smartly features the plug and play' technology. With the scale of 1/18, this HPI RTR RS4 brings the thrill of racing outdoors inside your house or garage; while the single belt 4WD drivetrain and rubber tires of this HPI racing car simplifies racing on tile, low-pile carpet, and wood floors. The Micro RS4 car lets you decide between long runtime of AA batteries or lightweight performance of AAA batteries as the smart battery holder adjusts accordingly. Enjoy superb control and precision over your cars with the fully loaded TX-2 radio system of this HPI RTR RS4.