Canon Directional Microphone DM-E1 (Black) Shotgun and Stereo (90 Degree/120 Degree) directional controls can be easily adjusted using the directivity switch for use in a variety of shooting situations. Included Wind Screen helps reduce peripheral sound from wind and other outside noise. Shock mount construction helps reduce camera operation noise and lens driver sounds. Frequency response of 50 Hz to 16 kHz. Built-in power supply of a single button-type lithium cell battery.