Toa Electronic's S4.04 is the perfect entry level system into the world of wireless technology. It is the improved successor model of Toa Electronic's thousand times proven and reliable S4.4 system. No matter whether it’s for vocals, speech or instrument applications, you will have this system up and running in no time and will be able to use it absolutely worry-free. The S4.04 already provides the same great sound quality as our larger S4.10 system; however, it is limited to a maximum channel count of four. But this should already be perfectly adequate for most small to medium applications.