The Free Space is the simplest product in the series. The main unit has a built-in battery, so there is no need for external power source such as plug-in power. Simply turn on the power switch and connect it to a digital recorder with a stereo mini pin type microphone input, camcorder, audio interface with phone terminal, and you can enjoy binaural recording. The microphone capsule hits the heart is made with a highly sensitive condenser microphone capsule that is easy to pick up small sounds. The collected sound has a warm tone at low to mid-range frequencies, and has a natural presence throughout the entire design. The microphone works well with medium wind without wind protection or other protection The wind can be heard realistically, without affecting the three-dimensional sense of binaural or putting a heavy load on the microphone.