This is a set of two PowerDeWise lavalier microphones. I've only used them about three times since I bought them. Everything in the photos is included. The microphones have 4-pin connectors, so if you want to plug them into a computer for recording, you'll need a 4-pin to 3-pin adapter. That adapter is also included. An extension cord and an adapter that allows two people to input audio simultaneously are also included. The microphones have been tested and are working. Regarding the microphone's sound pickup, you need to hold it close to your mouth, but on the other hand, it's a microphone that doesn't easily pick up background noise. Please understand that these are used items before purchasing.