Terrible (for 2.4/5GHz). They seemed to have worked around there not being a lot of hobbyist receivers by buying toy submarines that use lower frequencies like

Terrible (for 2.4/5GHz). They seemed to have worked around there not being a lot of hobbyist receivers by buying toy submarines that use lower frequencies like 40MHz and used the boards from there, nifty but seems very limited. https://brickexperimentchannel.wordpress.com/2022/07/13/rc-submarine-4-0-radio-7-10/ https://brickexperimentchannel.wordpress.com/2022/07/13/rc-s...