How to maximize the WIFI speed of my Rock Space WIFI Extender? The first thing is to position the extender judiciously. Secondly, change the frequency band. Some WIFI extenders are single WIFI band operating. It means they can only work on the 2.4 GHz frequency band while some other range extenders are dual-band and tri-band operating. Can your Rock space WIFI extender work on 2.4 GHz and 5 GHz wireless bands? Then try to shift the frequency from 2.4 GHz to 5 GHz. Each frequency band has their strength. The 2.4 GHz band offers superior coverage; it is more prone to WIFI interference.