A vocalist is usually thought of as a crucial member of a band as largely the entire band and their music is judged on the vocal interpretation and performance of the singer. Lead singers can turn average songs into great songs with dynamic vocal performances and can therefore alter the audience's perception of the band. The opposite is also true where great songs become merely average because of poor vocals and the inability to deliver the song in the way that it was written.
So, as you can gather, being a lead vocalist is a huge position of responsibility - there are a few accessories highlighted here that may help to deliver a great performance. The first and most obvious thing is a really good vocal microphone that will project the voice and give a clear natural sounding response. Vocalists who also play an instrument may want to consider a "head-mic" which is a microphone that is worn as part of a headset and keeps the hands free to play the instrument.
Other handy accessories include some kind of vocal processor such as reverb, echo, delay, or a harmoniser. A music stand is always a useful tool for holding lyric sheets and set lists, plus the faithful old footswitch for turning off the reverb or echo in between songs or when you're speaking to the audience.
