The BHI Compact In-Line module is a lightweight DSP noise cancelling unit made from tough impact-resistant black ABS plastic, making it suitable for portable use. The unit is easy to set up and accepts either mono or stereo signals on the input and you can either connect headphones or loudspeakers to the output so that you can enjoy your listening experience straight away.  This intuitive microprocessor controlled unit has two rotary encoders with push buttons that perform all the functions, enabling you to change the settings quickly and easily in “real-time” to suit your current operating conditions.