I'm new to the world of sound equipment, but I found a really nice deal on a used Sennheiser ME 66. Unfortunately, I was expecting an XLR port, but instead it has this (see picture). I'm not sure what to call that, so I have no cord to plug this microphone into anything. The plug is about 1.5 inches deep into the microphone. I'm a little worried I got ripped off, but that might just be a testament to how little I know about microphones.
So what is the name of this kind of plug? What kind of equipment do I need to use this microphone? Thanks in advance.