The Mould King 6 Channels Powered Module 6.0 is probably one of the best all-in-one power sources and control units out there for LEGO RC MOCs.
What makes it special is that it comes with a 6-channel transmitter with proportional control and manually reversible channels.
The advantages of a transmitter versus a mobile app are that you can connect it in 3 seconds and your MOC is ready to run without any extra concerns, you have something physical that can be touched, which helps to improve your driving skills, and having 50 meters range thanks to 2.4 GHz Radio Control Technology.
