AT9913iS is a Line gradient shot-gun Microphone which is perfect for recording speech, meeting record, school lecture and etc It takes power from user's smartphone by using supplied plug-in. So, there is no battery power needed. There is a Ø3.5 mm stereo mini jack for connecting to earphones or headphones, so user can monitor the sound immediately after recording. AT9913iS uses pivot-floating-structure can reduce the unnecessary vibration or the ambient noise while recording. Its free-angle-mechanism can adjust the angle-tune, easily, smoothly, and freely. The windscreen allows user to use the microphone outside and minimize the noise.