舒尔会议话筒　SHURE　503BG

■Cardioid pickup pattern and close-talking operation keep unwanted signals and background noise at low levels
■Constant output over voice spectrum when close talked
■Low-impedance design permits long cable runs in extreme hum fields
■Small unobtrusive design does not interfere with CRT visibility
■Frequency response: 100 to 7,000 Hz