The Sound Grabber II hemispherical boundary layer microphone utilizes Pressure Zone Microphone® technology in which sound waves reinforce themselves in the area nearest a flat surface. Thus, the Sound Grabber II will pick up sounds at distances with clarity while speakers or vocalists can move freely around the microphone without their tone quality changing. The Sound Grabber II is powered by an internal AAA 1.5V battery. The 3.5mm jack output is unbalanced and of mid-impedance, which allows it to connect directly to cameras and recorders.