the 4 in 1 one it uses on the honey bee i feel in one of them main reasons why it flys so well on falcon you can't really adjust ne thing besides whats on the Tx .. ive bee flying the HB all night im like on my 10th pack on my falconm i barly got even 3 packs in on it cause controling it was a pain i really was gunna give up on heli's untill this i came across this HB i still can't belive how quick i pick up hovering and moving around a little NIGHT and DAy