Since this microphone has been discontinued, there is not a good webpage to link to. It is very similar in appearance to the AKG D310, but the head is larger. Most people have never heard of this mic, but it was one that the musical group ABBA liked and used. They are prominently displayed in the live concert that ABBA recorded in Australia in 1979.
There's not a lot that's particularly outstanding or unique about the D330BT except that it has two switches that can be used to tailor the audio response. One switch controls treble boost, and the other switch controls bass cut. If you look around, you can find one for less than $100, but make sure you get a good one because it is unlikely that AKG has parts for them or will still repair them.