Flipsky remote range?

Planing a tow buggy build and considering a flipsky kit with motor controller and remote.
My question is the range of the Flipsky remote is it enough?

get a BREmote. I have Flipsky anbd Maytech and both are 2.4GHz and this is not a long range protocol, even with external antenna mounted on the flag 3 feet above water.
BREMote uses 915/815hz which is a very long range.