Anki OVERDRIVE Expansion Track Speed Kit Price:  $17.95 (as of 25/12/2019 00:52 PST- Details)

Use your mobile device to take command of real robotic Supercars in Anki OVERDRIVE.
Build long straightaways where there’s nowhere to hide with the Speed Kit!
An Anki OVERDRIVE Starter Kit and a compatible mobile device are required to play.