I needed something that I can carry with me if I want to record the audio and my friend said just use your phone. The thing is that most phones can't really record for long periods of time so I passed on that option. Besides, I needed something legit because it was to record some musical performance and then I came across an affordable boss micro br at musicians friend. Man oh man, its micro and uses an sd card that could hold up to 32 gigs worth of stuff. It uses batteries and perfect all around for all your audio recording needs.