Functions:
-CPU overclocking
-CPU governor modifications
-Virtual memory parameter modifications, like I/O scheduler and more
-Charging current control, this only works for you if boefflas charge level interface is in the kernel integrated
-Audio modifications, this only works if Boeffla Sound Control is in your kernel integrated.
Most custom ROM's for exynos4 devices include Lord Boeffla's audio and charging interfaces, to customize them for your own needs.