This is just the Receiver without remote control and speaker
Get this extra board so that you can control 2 cars with just one remote by setting Car 1 or Car 2 on the receiver board
For full set link here - https://www.wpl-rc.com/collections/upgrades/products/sound-system-v3
* the set doesn't come with any plug/battery connector, you may use your own that fits
Watch video below to find out how it works and all the cool features!