JTZ Professional Mini Shotgun Interview Uni-directional System Em-320e Microphone This series interviewing professional microphones embodied with advanced controllable circuit and high quality condenser cartridge.this series are characterized to be uni-ulter-directional,high sensibility, and with good frequency response It is best choice for business like media itterview, conference, speech, stage, filming, television, camera and camcorder, DVD/Skype/MSN/Computer, etc It is the camera Microphone Mic for different brands of camera Frequency Response:100Hz-16KHz The using time of the battery:26hours(using one battery of NO.5)