Features & description: Plug A: 8 pin  female;Plug B: 8 Pin male Microphone extension cables for CEL-63x sound level meters  Extension cable is intended for the connection of the preamplifier of the measurement microphone with the sound level meter.  Length:2M/3M/5M/10M(any other length you need ,you can message us.we can customize) The high-class shielded microphone cable and additional securing devices ensure high resistance to electromagnetic disturbances.