Where needs it ?

  Low-power switching amplifier measurement

    Hands-free bluetooth audio parameters debug and test

    Mobile audio products  parameters debug and test 

    Multimedia audio products audio parameters debug and test 

    Low pass filter for digital audio decoder

Who needs it ?

    Amplifier products manufacturing plant

    Specialized for Maintenance Testing

    R & D engineers, to debug switching amplifier

    Personal, for DIY digital audio products

https://www.ebay.com/itm/320684011405